Nidek Medical RT-3100 Operator's Manual
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Nidek Medical RT-3100 Operator's Manual

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REFRACTOR
REFRACTOR
RT-3100
RT-3100
OPERATOR'S MANUAL
OPERATOR'S MANUAL

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Summary of Contents for Nidek Medical RT-3100

  • Page 1 REFRACTOR REFRACTOR RT-3100 RT-3100 OPERATOR’S MANUAL OPERATOR’S MANUAL...
  • Page 2 Original instructions NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan (Manufacturer) Telephone: +81-533-67-6611 Facsimile: +81-533-67-6610 NIDEK CO., LTD : 3F Sumitomo Fudosan Hongo Bldg., 3-22-5, Hongo, (Tokyo Office) Bunkyo-Ku, Tokyo 113-0033, Japan Telephone: +81-3-5844-2641 Facsimile: +81-3-5844-2642 NIDEK INCORPORATED : 47651 Westinghouse Drive, Fremont, California 94539, U.

  • Page 3: Safety Precautions

    BEFORE USE, READ THIS MANUAL. This operator’s manual includes operating procedures, safety precautions, and specifications for the NIDEK REFRACTOR RT-3100 when it is used in combination with any of the NIDEK chart presenting devices* . The dioptric powers are indicated with a reference wavelength of 546.07 nm.
  • Page 4 Usage precautions Before Use WARNING Be sure to secure the refractor head to the refractor arm. • If the refractor head is dropped or falls, injury or device failure may result. Connect the power plug to a grounded outlet. • Electric shock or fire may result in the event of malfunction or power leakage.
  • Page 5 • requirements for electrical and electronic equipment that may disturb, or be disturbed by, other equipment. The RT-3100 complies with these requirements as tabled on Pages 123 to 126. Follow the guidance in the tables for use of the device in an electromagnetic environment.
  • Page 6 During Use WARNING When moving the refractor head, make sure that there are no obstacles in • its path. If the arm is swung carelessly, it may bump against someone or something and injury or malfunction may occur. CAUTION When installing and operating the device, observe the following •...
  • Page 7 Perform the visual and operation checks before using the device. If any • abnormality is found, do not use the device. Continued use of the device under such abnormal conditions may affect the data accuracy. Unexpected malfunction or faulty diagnosis may induce unexpected health hazards.
  • Page 8 Patient environment The patient environment is the volume of space in which contact can occur between the patient and any part of the device (including connected devices) or between the patient and any other person(s) touching the device (including connected devices). Use devices that comply with IEC60601-1 in the patient environment.

  • Page 9: After Use

    After Use CAUTION If the device will not be used for the extended period, disconnect the power • cable from the wall outlet. Settled dust may collect moisture, and short circuit or fire may result. Occasionally clean the prongs of the power plug with a dry cloth. •...
  • Page 10 Disposal CAUTION Follow the local ordinances and recycling regulations regarding disposal • or recycling of the components. The device contains the circuit board with a lithium battery mounted. Because the disposal method of lithium batteries varies according to the local government, follow the local governing ordinates and recycling plans when disposing of the circuit board with the lithium battery.

  • Page 11: Table Of Contents

    Table of Contents 1. BEFORE USE ........1 1.1 Outline of Refractor .
  • Page 12 3. ADVANCED FEATURES ......45 3.1 Data List ............. . 45 3.2 Setting Auxiliary Lenses .
  • Page 13 4.5.12 Horizontal coincidence test......... . . 94 4.5.13 Schober test .

  • Page 15: Before Use

    It allows the refractor and charts to be controlled together. Normally, the relay box is installed on the system table (not included in the RT-3100 package.) Intended Use This instrument provides a means for positioning spherical and cylindrical lenses, prisms and other optical devices in front of a subject's eyes for the purpose of determining refractive error and binocular functions.

  • Page 16: Configuration

    BEFORE USE: Configuration Configuration 1.3.1 Refractor head 7. Near point rod Operator’s side 8. Level adjustment 6. Near point card knob 5. Level 4. Forehead rest knob 3. VD check window 2. Near point lamp 1. Measuring window Patient’s side 9.
  • Page 17 BEFORE USE: Configuration 1. Measuring windows The patient looks at any chart through these windows. 2. Near point lamp Illuminates the near point card. Pressing the left side key displays the chart control screen. Pressing on the screen turns the lamp on or off. 3.

  • Page 18: Control Box

    BEFORE USE: Configuration 9. Forehead rest The patient's forehead rests here during refraction. Clean it before each refraction. See "5.2 Cleaning Forehead Rest" (Page 108). 10. Face shield The patient's face touches here during refraction. Clean the face shields before each refraction. See "5.3 Cleaning Face Shields"...
  • Page 19 BEFORE USE: Configuration 6. Front key Used to forward to the next programmed refraction sequence. Pressing the next chart icon on the screen also forward next programmed refraction sequence. + Front key ⇒ Returns to the previous sequence. 7. Left side key Displays the chart control screen.
  • Page 20 BEFORE USE: Configuration 1. PD display and change key Enters the mode to change the pupillary distance. Monocular PD (1/2 PD) ⇒ Press the R or L side of the binocular PD field in PD mode ( in PD mode) to enter the value. Leave the mode ⇒...
  • Page 21 BEFORE USE: Configuration 5. Current data Displays the data of the lens currently inserted in the refractor. Press other data fields to be changed as desired. The numeric fields where change is possible are highlighted. The value can be changed with the dial, , or 5-1.
  • Page 22 BEFORE USE: Configuration 5-7. [ ]/[θ] Goes into the mode to enter the base up/down prism power in rectangular coordinates or prism base angle in polar coordinates. [θ] Pressing enters both eye specifications of Entering mode. Pressing the value on the R side enters the right eye specification of Entering mode. Pressing the value on the L side enters the left eye specification of Entering mode.

  • Page 23: Control Panel

    • All the displayed data is deleted. 3. Pilot lamp Lights up in blue while the RT-3100 is powered on. 4. Eye selection keys Selects the right eye (R), left eye (L), or both eyes (BIN) for subjective refinement. • The occluder is set automatically to the non-selected eye side.
  • Page 24 BEFORE USE: Configuration 4-3. Opens the both measuring windows. Data entry for both eyes is available. 5. Mask keys Isolate any horizontal or vertical line or single letter on the chart. Press any of the chart keys to cancel the mask functions. The visual acuity of the isolated horizontal line or letter is shown in the VA field on the screen.
  • Page 25 BEFORE USE: Configuration • In cylindrical axis measurement, the cross cylinder lens is inserted so that its minus axis is located 45º from the minus axis position of the cylindrical lens. • In cylindrical power measurement, the cross cylinder lens is inserted so that its minus axis is located 90º from the minus axis position of the cylindrical lens.
  • Page 26 BEFORE USE: Configuration Rear side of the control box 1. Printer 2. Communication port 1. Printer A printer for printing measurement values is built-in. After printing, the paper is automatically cut with space left so that the paper remains in the printer but can be easily pulled free.

  • Page 27: Relay Box

    BEFORE USE: Configuration 1.3.3 Relay box The relay box is normally installed in the system table. 1. PC connector 2. CP connector Power switch 3. CB connector Power inlet 4. MB connector 1. PC connector Connects to a PC. 2. CP connector Connects to a chart presenting device (CP).

  • Page 28: Connecting Each Unit

    BEFORE USE: Configuration 1.3.4 Connecting each unit The diagram below indicates the configuration of the unit type (for installing the other company’s table). Control Box (CB) Refractor Head(MB) MB connector Relay Box (RB) CB connector...

  • Page 29: Labels

    Indicates that the operator must refer to the related instructions in the operator’s manual prior to operation. Indicates that the RT-3100 is classified as a device with a Type B applied part. The applied parts is the forehead reset (see 9. in “1.3.1 Refractor head” (page 2)).
  • Page 30 <Rear side of the Control Box> For CE and other countries For the USA CE marking Indicates that the product conforms fully to the requirements of the Medical Device Directive (93/42/EEC). The RT-3100 is classified as a Class I according to the Medical Device Directive.
  • Page 31 The symbols shown on the display correspond to the symbols and those names defined in ISO 10341 (Ophthalmic instruments - Refractor heads) as shown in the following table. Marking Auxiliary lens RT-3100 ISO 10341 Red maddox rod Maddox rods Pinhole plate...

  • Page 32: Before First Use

    BEFORE USE: Before First Use Before First Use Confirm that the power cord of the system table in which the RT-3100 is installed is con- nected into a wall outlet. Attach the forehead rest on the refractor Forehead rest head.
  • Page 33 BEFORE USE: Before First Use Attach the near point rod in the refractor head. Two round indentations are located at the base of the near point rod. Insert the rod as far as possible with the round indenta- tion on the opposite side of the near point card knob facing the knob.

  • Page 34: Getting Started And Exiting

    1.6.2 Restoring from power saving mode If the RT-3100 is idle for about 15 minutes (variable) without any key operation, it goes into power sav- ing mode. In this mode, the screen backlight and chart presenting device lamp go out.

  • Page 35: Operating Procedures

    OPERATING PROCEDURES Operation Flow 1.6.1 Getting started (Page 20) ⇓ 2.2 Entering Data (Page 22) 2.2.1 Manual data entry with dial.............. Page 22 2.2.2 From Eye Care card ................ Page 23 ⇓ 2.4 Preparation (Page 26) ⇓ Refraction 2.5 Standard Program Refraction............. Page 27 2.6.1 Chart selection ................

  • Page 36: Entering Data

    OPERATING PROCEDURES: Entering Data Entering Data Enter objective (AR) and/or lensometry (LM) data. 2.2.1 Manual data entry with dial Manual data entry is also available with the dial. • When the AR or LM data is entered with the dial, the subjective data field does not open automatically.

  • Page 37: From Eye Care Card

    Press the print key of the auto refractometer or lensmeter. The measured data is printed and then written to the Eye Care card. Eye Care card to RT-3100 Insert an Eye Care card into the Eye Care card slot on the control box.

  • Page 38: Setting Prism Lenses

    OPERATING PROCEDURES: Setting Prism Lenses Setting Prism Lenses 2.3.1 Displaying prism values When ADD or VA is displayed, press [VA/Δ] to go into prism entry mode. 2.3.2 Switching between rectangular and polar coordinates Go into prism display mode. Press [XY] or [rθ] on the screen. θ...

  • Page 39: Polar Coordinates (Rq)

    OPERATING PROCEDURES: Setting Prism Lenses 2.3.4 Polar coordinates (rθ) Press [ △ ]. The rotary prism lenses are set in the refractor head. The numeric field of △ is highlighted in blue. Enter the prism absolute values. Turn the dial to change the absolute values (in 0.5Δ increments). It is also possible to change them in 0.1Δ...

  • Page 40: Preparation

    OPERATING PROCEDURES: Preparation Preparation Place the refractor head in front of the patient’s eyes. 1) Clean the forehead rest, face shields, and measuring windows beforehand. See "5 MAINTENANCE" (Page 107). 2) Instruct the patient to lean against the forehead rest and look through the measuring win- dows.

  • Page 41: Standard Program Refraction

    OPERATING PROCEDURES: Standard Program Refraction Standard Program Refraction The RT-3100 includes one standard program (Program A) for full-corrected far value and prescription. See "7.3 Standard Programs" (Page 122) for all test items in the standard programs. In this manual, Program A is presented as an example.
  • Page 42 OPERATING PROCEDURES: Standard Program Refraction Measure the cylindrical axis. 1) Press the front key. The dots chart is presented. A cross cylinder lens (±0.25) is set. 2) Measure the cylindrical axis with the cross cylinder lens. Front button Ask the patient which is sharper, chart 1 presented by pressing or chart 2 pre- sented by pressing...
  • Page 43 OPERATING PROCEDURES: Standard Program Refraction Refine the spherical power with the red-green chart. 1) Press the front key. The SPH +0.50 D lens is automatically added to fog the vision. The red-green chart is presented. 2) Reduce fogging gradually until the sharpness of the letters on the red and green sides appears equal.
  • Page 44 OPERATING PROCEDURES: Standard Program Refraction Perform the binocular balance test. 1) Press the front key. The polarizing filters are set in the measur- ing windows; Right eye: 135º, Left eye: 45º When the three lines chart is not displayed in three lines or the two lines chart is not displayed in two lines, the binocular balance test cannot be performed.
  • Page 45 OPERATING PROCEDURES: Standard Program Refraction ′ When the patient has stereoscopic vision with a high accuracy (normally 1 ) and has no symptoms of headache or eye strain, his/her phoria is usually negligible. When the patient can recognize the ′ stereoscopic difference between the top and right lines, his/her stereoparallax is 1 .
  • Page 46 OPERATING PROCEDURES: Standard Program Refraction 1) Press the front key. The “Near Vision test?” message appears. 2) Select whether the near vision test is performed or not. Perform the near vision test. → Select [Yes]. The cross cylinder lenses are set and near point lamp lights up.
  • Page 47 OPERATING PROCEDURES: Standard Program Refraction 1) Press the front key The cross cylinder lenses are removed. Set the values of the addition powers adjusted in Step 13 subtracted from the ones measured in Step 18 as the addition powers for prescription. 2) Reverse the near point card and place the visual acuity chart in front of the patient.

  • Page 48: Chart Presentation

    OPERATING PROCEDURES: Chart Presentation Chart Presentation 2.6.1 Chart selection Press the left side key. The chart control screen appears. Presenting chart Left side switch Press the desired chart key at the right of the screen to present the corresponding chart. The selected chart appears.
  • Page 49 OPERATING PROCEDURES: Chart Presentation moving an isolation located at one end of the chart, short beeps are audible and the isolation moves to the opposite end of the chart.) . ⇒ The isolation moves up or down. • Press • For charts with four columns on the SSC, the vertical isolated line is moved between only the two columns in the middle.
  • Page 50 OPERATING PROCEDURES: Chart Presentation How to apply the red-green filter Press The red-green filter is applied to the presented visual acuity chart. While the red-green filter is applied; • Press ⇒ The visual acuity chart changes to another. . ⇒ The red-green filter is released. •...

  • Page 51: Chart Lamp, Near Point Lamp On/Off, And Ssc Chart Position Adjustment

    OPERATING PROCEDURES: Chart Presentation 2.6.3 Chart lamp, Near point lamp ON/OFF, and SSC chart position adjustment The buttons on the left of the chart control screen can be used to turned on/off the chart lamp and the near point chart lamp. In addition, the SSC, chart presenting position can be adjusted. : Turns off the chart lamp, display backlight, and near point lamp.

  • Page 52: Low Illumination, Glare Lamp, And Contrast Functions (Ssc Series)

    OPERATING PROCEDURES: Chart Presentation 2.6.4 Low illumination, glare lamp, and contrast functions (SSC series) When the SSC-350, SSC-350CG, or SSC-330U (equipped with optional glare lamp) is connected, the following functions are available. Low illumination Glare lamp Contrast SSC-350T/M/ Available Unavailable Unavailable SSC-370T/UK/M SSC-370MG...
  • Page 53 OPERATING PROCEDURES: Chart Presentation Low-light illumination Glare lamp ON Contrast 25% • The glare lamp, and contrast functions are available at any time during refraction other than when in Near mode. • The low illumination and contrast functions cannot be used at the same time.

  • Page 54: Contrast Function, Night Mode, And Reverse Function (Sc Series)

    OPERATING PROCEDURES: Chart Presentation 2.6.5 Contrast function, Night mode, and Reverse function (SC series) When the SC series is connected, is dis- played on the chart control screen as shown to the right. : Switches the chart contrast in the order of 25%, 12.5%, 6%, and 100% (normal contrast).
  • Page 55 OPERATING PROCEDURES: Chart Presentation : Switches between the low-light illumination and standard light illumination. (SC-1600 and SC-1600 Pola only) The low-light illumination function makes it possible to test the visual acuity under night-time conditions. This function can test whether or not the subject can recog- nize the low-light chart (9 to 11 cd/m ) for reference to diagnose light sense distur-...

  • Page 56: Link Off Function

    OPERATING PROCEDURES: Link Off Function Link Off Function This function prevents auxiliary lenses or mode (S/C/A) from being switched automatically when changing a chart. Press the left side key. The chart control screen appears. Press LINK-OFF is displayed on the current chart display and indicates that the link is turned off.

  • Page 57: Printing

    OPERATING PROCEDURES: Printing Printing The data is printed with Printout sample: ID No. Space for name and sex Measured time and date Prescription Working distance Unaided visual acuity Lensometry data (LM data) Near powers Pupillary distance Near pupillary distance PD for glasses Near pupillary distance corre- sponding the WD (when Objective data (AR data)
  • Page 58 OPERATING PROCEDURES: Printing Whether the CL data (CL conversion value) is printed or not The Print CL data parameter selects whether the CL conversion value of the subjective data is printed together with the normal data. See "3.9 Parameter Settings" (Page 59). Whether the trial lens data is printed or not The Print TL data parameter selects whether the trial lens (TL) data for the final prescription is printed together with the normal data.

  • Page 59: Advanced Features

    ADVANCED FEATURES Data List It is possible to show all measured data by a list. Select [Data List]. 1) Call up the Main Menu screen. Press the right side key. 2) Press [Data List]. 2) 2) Select the desired data. Select the data with the function key.
  • Page 60 [End] returns to the normal measurement screen. The contact lens conversion value is the value converted the Subjective value from VD (vertex distance) 12 mm to 0 mm. When the RT-3100 has no final prescription, the subjective data is displayed.

  • Page 61: Setting Auxiliary Lenses

    ADVANCED FEATURES: Setting Auxiliary Lenses Setting Auxiliary Lenses Auxiliary lenses are automatically set according to a selected chart. However, setting other lenses are also possible as follows: * It is possible to switch the lens power for retinoscope (+1.5/+2.0) and to set the fog amount for both eyes open.

  • Page 62: Specifying Sub Window Display Data

    ADVANCED FEATURES: Specifying Sub Window Display Data Specifying Sub Window Display Data Items to be displayed in sub window 1 and 2 can be specified. When no item is specified, the measurement data previously set in sub window 1 and measurement data set prior to previous one is displayed in sub window 2.

  • Page 63: Changing Id No

    ADVANCED FEATURES: Changing ID No. Changing ID No. The ID No. can be changed. Press the right side key. The Main Menu screen appears. Press [ID No.]. The numeric keypad appears. Enter the desired number with the numeric keys. It is possible to enter the number up to 12 digits from 1 to 999999999999.

  • Page 64: Calling Up Most Recent Data

    ADVANCED FEATURES: Calling up most recent data Calling up most recent data When the display is cleared by printing, the last printed data is stored in the instrument. This data can be entered with the following procedure. Press the right side key. The Main Menu screen appears.

  • Page 65: Programming

    ADVANCED FEATURES: Programming Programming The RT-3100 has three programs of A, B, and C. The standard program has already been written in Programs A as factory setting. Programs B and C are empty. All programs (A, B, and C) are programmable.
  • Page 66 ADVANCED FEATURES: Programming Press either of [A], [B], or [C]. Press [Clear]. The confirmation message “Are you sure?” appears. Press [Yes]. All contents of the selected program are cleared.

  • Page 67: Programming

    ADVANCED FEATURES: Programming 3.6.2 Programming To program Program A, set the Program A parameter to User beforehand. Display the Programming screen. 1) Press the right side key. The Main Menu screen appears. 2) Press [Programming]. Select the program to be programmed.
  • Page 68 ADVANCED FEATURES: Programming Press either of [A], [B], or [C]. The contents of the selected program are displayed. (When the program is empty, each step key is blank.) Select the step key to be written or changed. Pressing the desired key displays the input screen.

  • Page 69: Operating Programs

    ADVANCED FEATURES: Programming Repeat Steps 4 to 6 until the desired charts are programmed in the presentation order. It is possible to store up to 32 steps. Exit from programming mode. Press [ ] twice to return to the Programming screen and press [End] to return to the nor- mal measurement screen.

  • Page 70: Importing Or Exporting Programs

    ADVANCED FEATURES: Programming 3.6.4 Importing or exporting programs It is possible to import or export the contents of Programs A to C from/to a CF card (optional) in the control box. To use this function, the CF card must be set beforehand. See "5.8 Setting CF Card (Compact Flash Card)"...

  • Page 71: Setting Time And Date

    ADVANCED FEATURES: Setting Time and Date Setting Time and Date The clock in the RT-3100 can be adjusted. Display the Adjust Clock screen. 1) Press the right side key. The Main Menu screen appears. 2) Press [Adjust Clock]. Press the item to be adjusted.

  • Page 72: Touch-Screen Panel Calibration

    ADVANCED FEATURES: Touch-screen Panel Calibration Touch-screen Panel Calibration The touch-screen panel is calibrated. When incorrect responses from the touch-screen panel are received, the detection point of the touch- screen panel may shift from the pressure point of the touch-screen pen. In this case, calibrate the touch-screen panel.

  • Page 73: Parameter Settings

    ADVANCED FEATURES: Parameter Settings Parameter Settings Display the Parameters screen. 1) Press the right side key. The Main Menu screen appears. 2) Press [Parameters]. Display the page in which the parameter to be changed is displayed with [ ] or [ ]. Pressing the setting field on the right side of the parameter to be changed toggles the setting.
  • Page 74 ADVANCED FEATURES: Parameter Settings  Detailed parameter options CYL mode: –, + Factory setting: – Setting for the cylinder reading. Selectable between + and –. AXIS step: 1, 5 Factory setting: 5 Setting for the increment to adjust axis values. Selectable between 1 and 5. SPH step (Shift): 0.50 D to 3.00 D Factory setting: 1.00 D Setting for the increment to adjust sphere values with...
  • Page 75 Print TL data: Yes, No Factory setting: No Setting for whether or not to print trial lens (TL) data for the final prescription. When the RT-3100 has no final prescription, the TL data for subjective data is printed. Clear after print: Yes, No Factory setting: Yes Setting for whether or not to clear measured data after printing.
  • Page 76 Chart link: Cable, Wireless 1 to 8, No (SC series) Sets the communication method with the SC-series. Cable ⇒ Connects the RT-3100 with the SC-series by cable. Wireless 1 to 8 ⇒ Communicates with the SC series by an optional wireless unit. The number from 1 to 8 indicates the communication channel.
  • Page 77 ADVANCED FEATURES: Parameter Settings System No.: Off, 1 to 10 Factory setting: Off Indicates which device measured the data. 1 to 10: The number is printed on the top line of print result. It is also output to the PC when the data is output.

  • Page 78: Importing Or Exporting Parameters

    ADVANCED FEATURES: Parameter Settings 3.9.1 Importing or exporting parameters It is possible to import or export the parameter settings from/to a CF card (optional) in the control box. To use this function, the CF card must be set beforehand. See "5.8 Setting CF Card (Compact Flash Card)" (Page 112) to set the CF card. Display the Parameters screen.

  • Page 79: 3.10 Exporting Data To Computer

    ADVANCED FEATURES: Exporting Data to Computer 3.10 Exporting Data to Computer Pressing exports the displayed data to a computer together with the printout. Exporting the data without printing is also possible with the following procedures. Press the right side key. The Main Menu screen appears.

  • Page 80: Displaying Images (Sc Series)

    ADVANCED FEATURES: Exporting Data to Computer 3.10.1 Displaying Images (SC series) The images in the SC series can be displayed on the SC series LCD. Press the Left side button to display the chart control screen. Pressing the left side key displays the chart control screen.

  • Page 81: Test Method

    TEST METHOD Unaided Visual Acuity Test Press [Unaided]. The unaided visual acuity (VA) test starts. Press The left measuring window is occluded. Obtain the unaided VA for the right eye. Obtain the best possible VA. Change the chart with The VA of the last presented chart is in the VA field.

  • Page 82: Aided Visual Acuity Test

    TEST METHOD: Aided Visual Acuity Test Aided Visual Acuity Test It is possible to measure the aided VA when LM data is entered. Press [LM]. The aided VA test starts. According to the LM data, the corrective lenses are set in the measuring windows. Select [VA] to test the right, left, and binocular VA.

  • Page 83: Astigmatism Test

    Present the astigmatism clock dial chart. Change the screen to the chart control screen and press . The RT-3100 goes into CYL mode. When the cylinder value is not 0, change it to 0. Fog the vision until the VA becomes about 20/200.

  • Page 84: Astigmatism Test With Cross Cylinder Lens

    See "4.4.1 Red-green test" (Page 73). Present the dots chart. Display the chart control screen and press The RT-3100 goes into AXIS mode. The cross cylinder lens is set. Measure the cylindrical axis. See 2) of Step 5 of "2.5.1 Program A" (Page 27).

  • Page 85: Astigmatism Power Test With Cross Cylinder Lens (The Hold And Remove Cross Cylinder Testing Method)

    TEST METHOD: Astigmatism Test 4.3.3 Astigmatism power test with cross cylinder lens (the hold and remove cross cylinder testing method) Use: Cylindrical power refinement with the cross cylinder lens Chart: Dots Auxiliary lens: Cross cylinder lens Ideal appearance: The dots chart when the cross cylinder lens is not set is seen sharper.
  • Page 86 TEST METHOD: Astigmatism Test 3) When the chart is seen sharper when the cross cylinder lens is removed, this test is fin- ished. (2) When the chart is seen sharper when the cross cylinder lens is removed When the chart is seen more sharply when the lens is removed at first attempt, change the direction of the cross cylinder lens and make adjustments.

  • Page 87: Spherical Refinement

    Present the red-green chart. Display the chart control screen and press The RT-3100 goes into SPH mode. Fog the vision. Turn the dial counterclockwise 2 increments to add SPH + 0.50 D. Reduce fogging gradually until the sharpness of the letters on the red and green sides appears equal.

  • Page 88: Cross Grid Test For Far Vision

    TEST METHOD: Spherical Refinement 4.4.2 Cross grid test for far vision Use: Spherical refinement Chart: Cross-grid Applicable model: CP series types T, P, and F Auxiliary lens: ±0.50 D cross cylinder lens (Fixed with the axis set at 90º.) Ideal appearance: The sharpness of the horizontal and vertical lines appears equal. [Procedure example] Press [Subj].

  • Page 89: Binocular Visual Function Test

    TEST METHOD: Binocular Visual Function Test Binocular Visual Function Test 4.5.1 Binocular balance test Use: To check the binocular balancing Chart: Binocular balance Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters (SC-2000, SC-1600: 3ΔBD to the right eye, 3ΔBU to the left eye) Ideal appearance: Right eye Left eye...
  • Page 90 , or The polarizing filters are set in the measuring windows. (The prisms are set for the SC-2000, SC-1600.) The RT-3100 goes into SPH mode. Fog the binocular vision. Press and turn the dial counterclockwise so that the binocular VA becomes between 20/30 and 20/25.

  • Page 91: Binocular Red-Green Test

    The polarizing filters are set in the measuring windows. (The prisms are set for the SC-2000, SC-1600.) The RT-3100 goes into SPH mode. Ask the patient, “How do the four numbers and double circles appear?”. (a) The sharpness of all four double circles are equal.

  • Page 92: Phoria Test

    TEST METHOD: Binocular Visual Function Test 4.5.3 Phoria test Use: To detect exophoria, esophoria, hypophoria, and hyperphoria Chart: Phoria Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters, binocular rotary prism (SC-2000, SC-1600: Red filter on the right eye, green filter on the left eye, binocular rotary prism) Type U Ideal appearance: Right eye...
  • Page 93 TEST METHOD: Binocular Visual Function Test Appearance of Phoria Correction chart <1> Turn the dial clockwise to add the BO prism powers until Esophoria a cross is formed. <2> Turn the dial counterclockwise to add the BI prism Exophoria powers until a cross is formed. <3>...
  • Page 94 TEST METHOD: Binocular Visual Function Test Types G, T, and F Ideal appearance: Right eye Left eye Binocular ideal (Orthophoria) [Procedure example] Present the phoria chart. Display the chart control screen and press The polarizing filters are set in the measuring windows. (The red and green filters are set for the SC-1600, SC-2000.) The base in/out prism powers can be entered.
  • Page 95 TEST METHOD: Binocular Visual Function Test Appearance of Phoria Correction chart <1> Turn the dial clockwise to add the BO prism powers until Esophoria a cross is formed. <2> Turn the dial counterclockwise to add the BI prism Exophoria powers until a cross is formed. <3>...

  • Page 96: Phoria With Fixation Test

    TEST METHOD: Binocular Visual Function Test 4.5.4 Phoria with fixation test Use: To detect heterophoria by giving stimuli for fusion Chart: Phoria with fixation Applicable model:CP series types T, U, ISO, and M/SSC-330 (300) type U/SSC-350 types T and TCG/SC series types T, M, and UK Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters, binocular rotary prism (SC-2000, SC-1600: Red filter on the right eye, green filter on the left eye, binocular rotary prism)
  • Page 97 TEST METHOD: Binocular Visual Function Test Ask the patient, “Is the top bar shifted to the left or right?” Right → Esophoria Left → Exophoria Ask the patient, “Do the horizontal bars line up?” Yes → No hyperphoria nor hypophoria No →...

  • Page 98: Mallet Test (Horizontal Phoria)

    TEST METHOD: Binocular Visual Function Test 4.5.5 Mallet test (horizontal phoria) Use: To detect heterophoria by giving stimuli for fusion Chart: Mallet (vertical bars) Applicable model:CP-770 type PhM, SC series type PhM Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters, binocular rotary prism (SC-2000, SC-1600: Red filter on the right eye, green filter on the left eye, binocular rotary prism) Ideal appearance: Right eye...

  • Page 99: Mallet Test (Vertical Phoria)

    TEST METHOD: Binocular Visual Function Test 4.5.6 Mallet test (vertical phoria) Use: To detect heterophoria by giving stimuli for fusion Chart: Mallet (horizontal bars) Applicable model:CP-770 type PhM, SC series type PhM Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters, binocular rotary prism (SC-2000, SC-1600: Red filter on the right eye, green filter on the left eye, binocular rotary prism) Ideal appearance: Right eye...

  • Page 100: Von Graefe Test (Horizontal Phoria)

    TEST METHOD: Binocular Visual Function Test 4.5.7 Von Graefe test (horizontal phoria) Use: To detect horizontal phoria Chart: Vertical line Applicable model: CP series types U and M/SSC-330 (300) type U/SSC-350 type M/SC series type M [For the other types, use the highest VA letter chart or the letter chart which is little higher than the patient’s VA.] Auxiliary lens: 6ΔBU to the right eye, rotary prism to the left eye Ideal appearance:...
  • Page 101 TEST METHOD: Binocular Visual Function Test Appearance of chart Phoria Correction <1> The upper column is on the left. Turn the dial clockwise to add the BO prism Esophoria powers until the two columns line up. <2> The upper column is on the right. Turn the dial counterclockwise to add the BI phoria prism powers until the two columns line up.

  • Page 102: Von Graefe Test (Vertical Phoria)

    TEST METHOD: Binocular Visual Function Test 4.5.8 Von Graefe test (vertical phoria) Use: To detect vertical phoria Chart: Horizontal line Applicable model: CP series types U and M/SSC-330 (300) type U/SSC-350 type M/SC series type M [For the other types, use the highest VA letter chart or the letter chart which is little higher than the patient’s VA.] Auxiliary lens: Rotary prism to the right eye, 10ΔBI to the left eye Ideal appearance:...
  • Page 103 TEST METHOD: Binocular Visual Function Test Appearance of Phoria Correction chart <1> The left row is higher. Right eye Turn the dial counterclockwise until the two rows line up. hyperphoria <2> The right row is higher. Left eye Turn the dial clockwise until the two rows line up. hyperphoria instead of the dial for fine adjustment.

  • Page 104: Maddox Test (Horizontal Phoria)

    TEST METHOD: Binocular Visual Function Test 4.5.9 Maddox test (horizontal phoria) Use: To detect horizontal phoria Chart: Fixation Auxiliary lens: Horizontal maddox rod to the right eye, rotary prism to the left eye Ideal appearance: Right eye Left eye Binocular ideal Present the fixation chart.

  • Page 105: Maddox Test (Vertical Phoria)

    TEST METHOD: Binocular Visual Function Test 4.5.10 Maddox test (vertical phoria) Use: To detect vertical phoria Chart: Fixation Auxiliary lens: Rotary prism to the right eye, vertical maddox rod to the left eye Ideal appearance: Right eye Left eye Binocular ideal Present the fixation chart.

  • Page 106: 4.5.11 Vertical Coincidence Test

    TEST METHOD: Binocular Visual Function Test 4.5.11 Vertical coincidence test Use: To detect aniseikonia and to correct vertical phoria Chart: Vertical coincidence Applicable model:CP series types T, U, P, F, ISO, and M/SSC-330 (300) types T and U/SC series types G, T, M, and P Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters, binocular rotary prism (SC-2000, SC-1600: Red filter on the right eye, green filter on the left eye) Ideal appearance:...
  • Page 107 TEST METHOD: Binocular Visual Function Test Vertical phoria correction Present the vertical coincidence chart. Display the chart control screen and press The polarizing filters are set in the measuring windows. (The red and green filters are set for the SC-2000, SC-1600.) The base up/down prism powers can be entered.

  • Page 108: 4.5.12 Horizontal Coincidence Test

    TEST METHOD: Binocular Visual Function Test 4.5.12 Horizontal coincidence test Use: To detect aniseikonia and to correct horizontal phoria Chart: Horizontal coincidence Applicable model: CP series types P and F/SC series type P/SC-1600 Pola G+ Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters, binocular rotary prism (SC-2000, SC-1600: Red filter on the right eye, green filter on the left eye) Ideal appearance: Right eye...
  • Page 109 TEST METHOD: Binocular Visual Function Test Horizontal phoria correction Present the horizontal coincidence chart. Display the chart control screen and press The polarizing filters are set in the measuring windows. (The red and green filters are set for the SC-2000, SC-1600.) The base in/out prism powers can be entered.

  • Page 110: 4.5.13 Schober Test

    TEST METHOD: Binocular Visual Function Test 4.5.13 Schober test Use: To correct heterophoria Chart: Schober Applicable model: CP series types T, P, and F, and ISO/SSC-330 (300) type T/SC series types G, T and P Auxiliary lens: Red filter on the right eye, green filter on the left eye, binocular rotary prism Ideal appearance: Right eye Left eye...
  • Page 111 TEST METHOD: Binocular Visual Function Test Ask the patient, “Is the cross shifted upward or downward?” Upward → Left eye hyperphoria Downward → Right eye hyperphoria The cross is in the center. → No vertical phoria When the cross is shifted from the center, correct it as follows: Appearance of Phoria Correction...

  • Page 112: 4.5.14 Stereo Test

    TEST METHOD: Binocular Visual Function Test 4.5.14 Stereo test Stereo test for SSC-350 types T and TCG Use: To detect stereoscopic vision Chart: Stereo Auxiliary lens: None Ideal appearance: 40 cm 12 cm 25 cm Present the stereo chart. Display the chart control screen and press Confirm that the patient can see the nine black dots arrayed in three lines with one dot from each line at a different depth.
  • Page 113 TEST METHOD: Binocular Visual Function Test Confirm that the upper and lower triangles appear to the patient to be closer. The stereoparallax is 10’ 30” (when the refraction distance is 5 m and the PD value is 60 mm, the upper and lower triangles appear to be about 101 cm closer to the patient). The test result OK or NG can be entered by the function button.
  • Page 114 TEST METHOD: Binocular Visual Function Test Stereo balance test for SC-1700 Pola Type G+ Use: To test prevalency of the eye Chart: Stereo balance Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters Ideal appearance: Right eye Left eye Binocular ideal The upper and lower triangles appear...
  • Page 115 TEST METHOD: Binocular Visual Function Test Stereo test for other types Use: To detect stereoscopic vision Chart: Stereo Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters (SC-2000, SC-1600: Red filter on the right eye, green filter on the left eye) Ideal appearance: Right eye Left eye...

  • Page 116: 4.5.15 Worth Test

    TEST METHOD: Binocular Visual Function Test 4.5.15 Worth test Use: To detect fusion and suppression Chart: Worth Auxiliary lens: Red filter on the right eye and green filter on the left eye Ideal appearance: Right eye Left eye Binocular ideal Green Pink or Red/Green : Red...

  • Page 117: 4.6.16 Pointer Test

    TEST METHOD: Binocular Visual Function Test 4.6.16 Pointer test Use: To measure cyclophoria Chart: Pointer Applicable model: SC-1700 Pola typeG+ Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters Ideal appearance: Right eye Left eye Binocular ideal (No fixation disparity) Present the pointer chart.

  • Page 118: 4.6.17 Double Pointer Test

    TEST METHOD: Binocular Visual Function Test 4.6.17 Double pointer test Use: To test fixation disparity Chart: Double pointer Applicable model: SC-1700 Pola typeG+ Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters Ideal appearance: Right eye Left eye Binocular ideal (No fixation disparity) Present the double pointer chart.
  • Page 119 TEST METHOD: Binocular Visual Function Test One hand angled This may occur at the time of oblique astigmatism correction or due to optical cause. Optical • Reduce the cylindrical power. cyclophoria • Bring the cylindrical axis close to the horizontal or vertical direction. Hands shifted to up- Horizontal phoria: Turn the dial clockwise per right...
  • Page 120 TEST METHOD: Binocular Visual Function Test...

  • Page 121: Maintenance

    MAINTENANCE Troubleshooting In the event that the RT-3100 does not work correctly, check the problem according to the follow- ing table before contacting your authorized distributor. Symptom Action The refractor does not start even • Confirm that the power cord is connected to a wall outlet.

  • Page 122: Cleaning Forehead Rest

    MAINTENANCE: Cleaning Forehead Rest Cleaning Forehead Rest Clean the forehead rest before each refraction. WARNING • Be sure to secure the refractor head before removing or attaching the forehead rest. If the refractor head is moved unintentionally, it may strike someone or something and injury may occur.

  • Page 123: Replacing Printer Paper

    MAINTENANCE: Replacing Printer Paper Replacing Printer Paper When a red line appears on the side of the printer paper, it means that the paper is running short. In such a case, replace the roll with a new one as soon as possible. •...

  • Page 124: Cleaning Printer

    MAINTENANCE: Cleaning Printer Pass the paper through the paper outlet and close the paper cover. Press the both top sides of the paper cover to close the cover. Paper outlet • Check that the cover is closed securely. If the cover is closed incompletely, the auto-cutter may not operate properly. Cleaning Printer Following an extended period of use, the paper feed on the printer auto-cutter becomes dirty due to cutting residue.

  • Page 125: Cleaning Measuring Windows

    Screws • Attach the protective glasses with the screws just after cleaning. Failure to do so could allow dusts to be settled inside the RT-3100. It may affect the viewability or cause malfunction. Cleaning Exterior When the cover or panel becomes dirty, clean it with a soft cloth.

  • Page 126: Setting Cf Card (Compact Flash Card)

    MAINTENANCE: Setting CF Card (Compact Flash Card) Setting CF Card (Compact Flash Card) When writing programs or parameter settings to the optional CF card, or reading the saved set- tings, set the CF card into the control box beforehand. • The CF card must be formatted with FAT or FAT32. Turn off the power switch on the system table and turn off the refractor power.

  • Page 127: 5.10 List Of Replacement Parts

    MAINTENANCE: List of Replacement Parts 5.10 List of Replacement Parts Part name Part number Remarks Printer paper 806-20-00001...
  • Page 128 MAINTENANCE: List of Replacement Parts...

  • Page 129: Specifications And Accessories

    [Degree of safety of application in the presence of a flammable anaesthetic mixture with air, or with oxygen or nitrous oxide] The RT-3100 is not suitable for use in the presence of a flammable anaesthetic mixture with air, or with oxygen or nitrous oxide, or flammable cleaning agents.

  • Page 130: Specifications

    SPECIFICATIONS AND ACCESSORIES: Specifications Specifications Measurable range • Spherical power –19.00 to +16.75 D (in 0.25 D/0.5 D to 3.0 D increments) • Cylindrical power 0.00 to ±6.00 D (in 0.25 D/1 D increments) • Cylindrical axis º º º 0 to 180 (in 1 increments)
  • Page 131 SPECIFICATIONS AND ACCESSORIES: Specifications Dimensions • Refractor head 355 (W) × 100 (D) × 276 (H) mm (excluding bracket) • Control box 160 (W) × 209 (D) × 165 (H) mm • Relay box 194 (W) × 227 (D) × 61 (H) mm Mass •...

  • Page 132: Standard Configuration

    SPECIFICATIONS AND ACCESSORIES: Standard Configuration Standard Configuration 6.3.1 Standard accessories • Refractor head •1 unit • Control box •1 unit • Relay box •1 unit • Near point card •1 unit • Near point rod •1 unit • Forehead rest •1 unit •...

  • Page 133: Appendix

    APPENDIX Linkage between Charts and Auxiliary Lenses The following table shows the auxiliary lenses linked to the charts when the Chart link parameter is set to Yes. Auxiliary lens Chart Mode Right eye Left eye VA charts Astigmatism clock dial Red-green Dots (XC mode)
  • Page 134 APPENDIX: Linkage between Charts and Auxiliary Lenses Auxiliary lens Chart Mode Right eye Left eye VA chart for near vision * The slash “/” indicates that the auxiliary lens changes alternately each time the chart key is pressed. The lens on the right side is set in the first press of the chart key.

  • Page 135: Va Conversion Table

    APPENDIX: VA Conversion Table VA Conversion Table Decimal Fraction (feet) Fraction (meters) 0.03 6/200 0.032 20/600 0.04 20/500 6/150 0.05 20/400 6/120 0.06 6/100 0.063 20/320 0.08 20/250 6/75 20/200 6/60 0.125 6/48 0.15 20/150 0.16 6/38 20/100 6/30 0.25 20/80 6/24 20/70...

  • Page 136: Standard Programs

    APPENDIX: Standard Programs Standard Programs The RT-3100 has three programs of A, B, and C which can be programmed by the user. The following standard programs have already been written in Program A as factory setting. Program A The final prescription is obtained after the monocular full correction (subjective data) is store. The bin- ocular balance test and stereo test are performed in the final field.

  • Page 137: Emc (Electromagnetic Compatibility)

    EMC (IEC 60601-1-2: 2007) Guidance and manufacturer's declaration - electromagnetic emissions The RT-3100 is intended for use in the electromagnetic environment specified below. The customer or the user of the RT-3100 should assure that it is used in such an environment.
  • Page 138 EMC (ELECTROMAGNETIC COMPATIBILITY) Guidance and manufacturer's declaration - electromagnetic immunity The RT-3100 is intended for use in the electromagnetic environment specified below. The customer or the user of the RT-3100 should assure that it is used in such an environment.
  • Page 139 EMC (ELECTROMAGNETIC COMPATIBILITY) Guidance and manufacturer's declaration - electromagnetic immunity The RT-3100 is intended for use in the electromagnetic environment specified below. The customer or the user of the RT-3100 should assure that it is used in such an environment.
  • Page 140 RF communications equipment and the RT-3100 The RT-3100 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the RT-3100 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the RT-3100 as recommended below, according to the maximum output power of the communications equipment.

  • Page 141: Index

    INDEX Aided visual acuity test ......68 Maddox test ......90 Astigmatism test .
  • Page 142 INDEX:...

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