Huvitz HRK-9000A Service Manual
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Huvitz HRK-9000A Service Manual

Auto ref/keratometer
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Auto Ref/Keratometer HRK-9000A

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  • Page 1 Service Manual Auto Ref/Keratometer HRK-9000A...
  • Page 2 HUVITZ reserves the right to make changes in its products or product specifications at any time and without prior notice, and is not required to update this documentation to reflect such...
  • Page 3 HUVITZ reserves the right to make changes in its products or product specifications at any time and without prior notice, and is not required to update this documentation to reflect such changes.

  • Page 4: Table Of Contents

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 3 Contents 1.Important Notice ......................... 4 2.Safety Information ......................5 3.Product Outline ........................ 11 3-1. Nomenclature ......................11 3-2.Optical System ....................... 13 3-3.Electrical System ....................16 3-4.Mode Setting ......................22 3-5. Principles of Measurement ................. 23 4.Repair Standard ........................

  • Page 5: Important Notice

    Huvitz reserves the right to make changes in its products or product specifications at any time and without prior notice, and is not required to update this documentation to reflect...

  • Page 6: Safety Information

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 5 2.Safety Information 2.1.Introduction Safety is everyone’s responsibility. The safe use of this equipment is largely dependent upon the installer, user, operator, and maintainer. It is imperative that personnel study and become familiar with this entire manual before attempting to install use, clean, service or adjust this equipment and any associated accessories.
  • Page 7 6 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 2.2.Safety Symbol The International Electro technical Commission (IEC) has established a set of symbols for medical electronic equipment, which classify a connection or warn of any potential hazards. The classifications and symbols are shown below.
  • Page 8 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 7 2.3.Environmental Considerations Please avoid the environment below for the operation and storage of the equipment Where equipment Where the machine can exposed to water vapor. exposed chemical or flammable Don’t operate the equipment substances. with wet hands.
  • Page 9 8 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ For the normal operation of the machine, please keep the ambient temperature is 10℃ ~ 35℃, humidity is 30% ~ 75% and atmospheric pressure is 800 ~ 1060hpa. For the Transformation of the machine, please keep the ambient temperature is -40℃ ~ 70℃, humidity is 10% ~ 95% and atmospheric pressure is 500 ~ 1060hpa.
  • Page 10 The manufacturer is not liable for damage caused by unauthorized tampering with the device(s). Such tampering will forfeit any rights to claim under warranty. The equipment may only be used together with accessories supplied by Huvitz’s. If the customer makes use of other accessories, use them only if there are usability under...
  • Page 11 10 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ technical safety aspects has been proved and confirmed by Huvitz or the manufacturer of the accessory. Only persons who have undergone proper training and instructions are authorized to install, use, operate, and maintain this equipment.

  • Page 12: Product Outline

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 11 3.Product Outline 3-1. Nomenclature 1. Head Rest : Preventing the vibration by fixing the head 2. Measurement Button: Performing the measurement by pressing it after focusing 3. Operation Lamp : Indicates whether or not the electric power is on 4.
  • Page 13 12 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 1. Power Supply Socket : A socket connecting to exterior power plug 2. Serial Interface Connector : A terminal connecting to the exterior equipment 3. Exterior Monitor Connection Connector : Connecting into the exterior monitor 4.

  • Page 14: 3-2.Optical System

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 13 3-2.Optical System...
  • Page 15 14 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 3-2-1.List of Optical Components 1 : patient’s eye 2-1, -2 : LED for lightening cornea 3-1, -2, : Ring unit of the keratometry 4-1 : White LED 4-2 : Blue LED 5-1 : Half mirror...
  • Page 16 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 15 R = Refractometer K = Keratometer C = Color imaging 3-2-2.Light Paths of the System Ａ : Ex t ernal il l umi nat i on (2-1, 2- 2  1) Ｂ : Corneal ob serv at i on syst em (1...

  • Page 17: 3-3.Electrical System

    16 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 3-3.Electrical System 3-3-1.Electrical construction diagram 3-3-1-1.System functional block diagram SMPS DC Output +5V, 4A Output +5V, 2A +12V, 1.8A LCD & Touch Interface Dual Line Fuse DC12V Power switch AC 100-240~ (DPST) SMPS 8.3A Main Board Signal...
  • Page 18 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 17 3-3-1-2.Power input electrical block diagram SMPS DC Output +5V, 4A Output +5V, 2A +12V, 1.8A DC12V Dual Line Fuse Power switch AC 100-240~ (DPST) SMPS...
  • Page 19 18 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 3-3-2.Electrical wiring 3-3-2-1.Main Board...
  • Page 20 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 19 3-3-2-2.Description of wire harness connection of main board Description (Connector number) Target HARNESS ASSY(MB(CN36) TO GLARE LED) GLARE LED HARNESS(MB(CN2) TO REF SM) REF MOTOR HARNESS ASSY(MB(CN3) TO CHART PI) CHART PI HARNESS(MB(CN4) TO CHART SM)
  • Page 21 20 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 3-3-2-3. Base Interface Board 3-3-2-4. Description of wire harness connection of Base Interface Board Description (Connector number) Target HARNESS(MB(CN37) TO BIF(CN1) DATA 40P) MAIN BD to BASE INTERFACE BD DATA HARNESS(BIF(CN3 CN7) TO Z ENC PI) BASE INTERFACE BD to Z AXIS ENCODER &...
  • Page 22 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 21 3-3-3. Layout diagrams for PCB 3-3-3-1.Picture of Main Board 3-3-3-2.Description of component of Main Board Ref No. Part name Description AM1808BZWT4 TI ARM MCU A3P1000-FG484 Actel FPGA (Logic Array) ADV7180BSTZ Video Decoder MDIN-241 SD to Full-HD Up-converter...

  • Page 23: 3-4.Mode Setting

    22 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 3-4.Mode Setting Turn-on the system with pressing button as following content of table Start Key Description [S/W Upgrade Mode] Download OS program into ROM via serial port and USB Printer Button (ex. COM) permanently. After downloading, always HRK- 9000A will start with new OS program.

  • Page 24: Principles Of Measurement

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 23 3-5. Principles of Measurement 3-5-1. Measurement principle of refractometry (1) Light beam from the source is incident on the examinee’s eye and reflected from it’s retina as in the Figure below. (2) According to the refraction condition of the examinee’s eye, that is, if the examinee’s eye is emmetropia, hyperopia or myopia, the reflected light from the...
  • Page 25 24 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ Image Lens Objective Lens MLA(Micro Lens Array) TV Camera...
  • Page 26 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 25 3-5-2. Measurement principle of keratometry When the ring light source of the keratometry is projected on to the cornea, it is reflected as a circle or an ellipse in the case of the eye with corneal astigmatism, the size and the shape of reflected light are different according to the radius of curvature of the cornea because the cornea is not a sphere.
  • Page 27 26 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ Lens for measuring Ring type light source for measuring (Mire Ring) TV Camera...
  • Page 28 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 27 3-5-3. The principle of Retro-Illumination observation 3-5-3-1. Principle of retro-illumination observation The incident lights of the infrared LED (spot light) onto the fundus of the eye are retro- scattered from it. The scattered lights from the fundus illuminate the vitreous humor and some of it go through the crystalline lens and the iris.

  • Page 29: Repair Standard

    4.Repair Standard 4-1.Checking and Control 4-1-1. Engineer Setup Mode Turn on HRK-9000A and wait several seconds until the measure screen in REF mode is displayed. Press the button and touch screen in following orders. 1) Press Printer button. 2) Touch the ‘R’ area of measurement data.
  • Page 30 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 29 4-1-2. Engineer mode of data storage and retrieval of the Setup 4-1-1 In the same way an engineer mode begins like Setup of each engineering mode will change the data. To save the changed data in the FRAM, press the SAVE SYS DATA on SAVE/LOAD.
  • Page 31 30 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 4) DISP - The image of currently selected camera mode is displayed. - Continuous press, DISP> ALIGN> CLIP> MEAS order to change the display mode. 5) ALIGN - Guide lines for the alignment of the LED signal displayed on the screen.
  • Page 32 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 31 you measure REF HIGH, measure +0 D ~ +20 D range. In the following ways : REF LED will change the brightness. 1) Select the camera mode by the R-LED mode. 2) Adjust the brightness of screen by pressing INCR or DECR button, and check LED DUTY in the top left screen.
  • Page 33 32 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ NOTE If you set the REF LOW or HIGH diopter, you must set-up 0 diopter model eye first. In the case of whole diopter model eye is already setup, If you set-up 0D model eye again, All of the other model eye diopter should be set up again.
  • Page 34 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 33 4-1-5. KER data set up (KER Test Mode) A. Begins “KER Test Mode” in the engineer mode. B. The menu in REF Test Mode is follows. 1) K-CCD - KER CCD camera images are displayed on the screen.
  • Page 35 34 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 6) DECR - If screen capture mode, Threshold levels decrease. 7) FOCUS - Focus Step setup begins. C. Proceed to the setup of the KER model eye’s Focus in the following ways. 1) K-CCD mode is selected, and adjust the focus precisely on the model.
  • Page 36 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 35 same way C ~ D. 7) Upon completion of the entire set of model eyes, engineer mode is stored in the SAVE SYS DATA 4-1-6. Check the setup data KER (KER Setup Data) A. Begin KER Setup Data in the engineer mode.
  • Page 37 36 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ C. Verify the data of KER model eye. 1) DIOPT - Diopter of the Model eye 2) R - Major axis length of mire-ring 3) C - Minor / Major ratio 4) A - Angle of major Mire-ring axis...
  • Page 38 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 37 A. Tracking Test begins in engineer mode. B. Tracking Test in the menu that follows. 1) LOOP - About the selected motors, begins to repeat the run. 2) ALIGN - Select the motor to move to the center position.
  • Page 39 38 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ NOTE To drive motors, each motor on the right side of the item by pressing the OFF symbol, ON will change. Each motor is driven in the topic POW Duty, ENC over the drive shaft encoder value, OFS central axis running from the location of the display relative to the distance E.
  • Page 40 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 39 4-1-8. Set tracking motor (Motor Setup) A. The Motor Setup begins engineer mode. B. Motor Setup can be set in the type of motor is as follows. 1) X-HEAD - The optical head portion of the X-axis drive motor...
  • Page 41 40 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 5) NEAR-RDF - X, Y, Z axis motor, respectively, right, bottom, front, when you move a short distance in the direction of Power 6) NEAR-ENC - Near the encoder based on the magnitude of 7) CENT OFFS...
  • Page 42 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 41 4-1-9. Setup VA A. Start VA Test & Setup in the engineer mode. B. Select lens mode (CYL0, CYL1, CYL ASSY, F-LENS) C. External camera is equipped for align on each lens mode. 4-1-10. Measuring Preferences (Measure Setup) A.
  • Page 43 42 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 1) REF SPH - REF measurement results of the SPH Shift 2) REF CYL - REF measurement results of the CYL Shift 3) REF AXS - REF AXS results of measurements of the Shift 4) KER RAD...
  • Page 44 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 43 4-1-11. Setting pupil distance (PD Setup) A. Engineer mode of the PD Setup begins. B. PD Setup in the menu is as follows. 1) SAVE - Changed the temporary storage of PD are set. 2) ZERO - The current value of the X-axis encoder must specify the initial position.
  • Page 45 44 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ button. Screen, the starting value for the PD (PD Start) in the current encoder value is output. 3) PD-left party based in the scale and press the joystick button. Screen, the exit value for the PD (PD End) will be printed in the current encoder values.
  • Page 46 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 45 The brightness of a MIRE LED’s PWM 5) FOCUS DUTY The brightness of a FUCUS LED’s PWM 6) FOCUS STEP The step of a FOCUS LED 7) CHART DUTY The brightness of a CHART LED’s PWM 8) WHITE DUTY The brightness of a White(Color) LED’s PWM...
  • Page 47 46 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ A. Start Factory Setup in the engineer mode. B. Make System backup begins 1) Press the Start Backup The FRAM data is stored in the back up. C. Verify Backup Data 1) You can verify the Fram and Backup data’s time.
  • Page 48 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 47 1) Press the Restore System setup would be initialized with Backup. E. Copy Fram begins. 1) System setup would be copied fram to fram...
  • Page 49 48 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 4-1-14 Color Test. A. Start color test button in the engineer mode. B. Verify the LCD Color temperature - 1~8(COOL ~ WARM) 4-1-15. Touch Setup. A. Start touch setup button in the engineer mode. B. Press start button or touch LCD a few seconds.
  • Page 50 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 49 C. Press the cross marker (9 section) until beep sound. 1) START Recalibrate.(return to previous screen) 2) APPLY Apply result now 3) RESET Factory reset 4) EXIT...
  • Page 51 50 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ Save and exit 4-1-16. DPC (Dead Pixel Correction) Setup A. DPC Setup begins in engineer mode. B. DPC Setup in the menu is as follows. 1) VIEW - The selected Pixel color camera and the location of the Dead Pixel is displayed as a rectangle on the screen.
  • Page 52 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 51 3) If you press the joystick, Dead Pixel beginning of the search and discovery of the Dead Pixel count is displayed on the screen. Ten thousand days When Buffer Full output with the message, DPC compensation will exceed the number of possible Dead Pixel.
  • Page 53 (1) Turn off HRK-9000A. (2) Start DNW program, set your PC’s COM port number, 115200 Bps. (3) Connect PC to HRK-9000A with serial cable. (4) Pressing the 5th key, then turn on HRK-8000A (5) DNW program will show the following screen.
  • Page 54 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 53 (8) After downloading, turn off and on the HRK-9000A. (9) Confirm the changed SW version on boot screen...
  • Page 55 54 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 4-1-19. How to upgrade OS program using DLP application (1) Copy the DSP application files. DSP consists of two files: the executable file (= HFCUSB.exe), the dll files(= cv100.dll, cxcore100.dll and highgui100.dll). It is no need to install it in your desktop computer.
  • Page 56 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 55 (4) Select ‘USB Controller B’ of ‘Data Received’ window and press ‘Open’ button. Then you can see below screen if connecting is corrected...
  • Page 57 (5) Check the ‘Status’ which located right side of ‘Open’ button. (6) Press ‘File Open (Bin/Bhc)’ button to select upload file. (7) Press ‘Transmit to HRK/HLM’ button to transmit. (8) Then you can see the transmission process on HRK-9000A display. (9) Finally turn off and on the machine.

  • Page 58: 4-1.Checking And Control

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 57 4-2.Disassembly and Assembly Procedure 4-2-1.Removing the Cover & Head rest Assy (1) (1) Remove the four screws of the Main body and then separate the Head Rest-Assy. (2) Remove the BOLTCAP, the screws and then separate the Back-Case-Bottom-Cover (3) Remove the BOLTCAP, the screws and then separate the Back-Case-Middle-Cover.
  • Page 59 58 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ (8) Separate the Moving-Base-Front-Assy (9) Separate the Moving-Base-Rear-Assy (10) Separate the Bottom-Base-Assy (11) Remove the four screws and then separate the OS-Total-Assy...
  • Page 60 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 59 4-2-2.Disassemblying the Moving Head Assy (1) Removal Method  Remove the screws and then remove the Slider-Assy(1)  Remove the screws and then remove the Y-Motor-Assy(2)  Remove the screws and then remove the Y-Axis-Frame-Assy(3) (2) Point for Assembly ...
  • Page 61 60 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 4-2-3. Disassemblying the LCD assembly (1) Removal Method  Remove the screws and then remove the Lcd-Arm-Top-Cover(1).  Remove the screws and then remove the Lcd-Swivel-Hinge-Assy(2).  Remove the screws and then remove the Lcd-Arm-Bottom-Cover(3).
  • Page 62 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 61 4-2-4. Disassemblying the OS ASSY ) Removal Method  Remove the screws and then separate the OS-B-Plate(1).  Remove the screws and then remove the OS-Cover(2)  Remove the screws and then remove the HRK9KA-Main-202(3) ...
  • Page 63 62 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ 4-2-5. Disassemblying the BASE BODY ASSY. Removal Method  Remove the screws and then separate the BTM-T-Cover(1).  Remove the screws and then separate the Joy-Plate(2).  Remove the screws and then separate the XB-LM-Bracket(3).

  • Page 64: Troubleshooting

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 63 5.Troubleshooting ) Troubles related with electricity  The power lamp does not light on.  The monitor is not bright enough. (2) Troubles related with LCD Monitor  Nothing is displayed.  The screen is moving.
  • Page 65 64 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ Phenomenon1: When Power is ON, there is no action Check whether power cable is inserted well check Fuse in the bottom side Take off the head Top cover 1. Check whether the cable from SMPS to Main Board is instered well 2.
  • Page 66 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 65 Phenomenon2: LCD monitor display nothing(But ohter functions works) Check whether Brightness Knob is turned well Take off the head Top cover Check the cables related to LCD Monitor 1. Main Board to LCD Moniter 2. Interface Board to LCD Inverter Board...
  • Page 67 66 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ Phenomenon3: Key or JoySticik does not work Take off the cover Check the cable of mainboard with Key or Joystick ((When pressing the button, check whether the voltage goes to 'L' level. Default is 'H' level))
  • Page 68 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 67 Phenomenon4: When printing out, there is some unclean side, especially end of paper Phenomenon5: When printing paper is not fed correctly Take off the head front cover Unconnect the cable from IO Board to the...
  • Page 69 68 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ Phenomenon6: Cannot see the eye fixation target Take off the head front cover Check whether LED is out Is LED out? Change the Optical Head with Motor Board Replace LED Phenomenon7: The results of Refractometry of TEST MODEL EYE is very different...
  • Page 70 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 69 Phenomenon 8 : Auto Focus movement is unstable or not working. Turn on Auto Focus mode and check focusing movement using test model eye. Moving too slow around focus? Decrease DIST CONST of the direction...
  • Page 71 70 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ Phenomenon 9 : Chin rest movement is not working. Press Up or Down button for Chin rest movement in measure mode. Not moving on any direction? Check the height level of chin rest. Okay Contract with Distributor.

  • Page 72: Technical Materials

    ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 71 6. Technical Materials (1) Fogging Method It is recommended that the refractive power of eye is measured when it is in the hyperopia-state. There happens some measurement error called mechanic myopia due to the accommodation of eye when it is measured by locating the internal eye-fixing target to the position corresponding to the eyesight of examinee.
  • Page 73 72 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ (2) Vertex Distance (VD) Vertex Distance is the distance between the backward vertex of the correcting lens (eye side) and the vertex of cornea. VD influences the refraction power of eyesight correction lens. If VD is increased, refraction power of correction lens is needed to be smaller, whereas, if VD is decreased, it is needed to be larger than that of the standard VD as the following equation.
  • Page 74 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 73 and minor meridian is displayed as +CYL. MIX : “-“ sign will be attached in the case of the myopic astigmatism whereas, “+” sign in the case of the hyperoptic astigmatism. The above-mentioned option can be chose in ‘User Setup Mode’...
  • Page 75 74 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ (4) Axis Axis is expressed counterclockwise from the ear side of the left eye as the origin shown in the figure below. (5) Pupil Distance (PD) Pupillary distance (PD) is the distance between the centers of the lenses of glasses.
  • Page 76 ---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-9000A 75 (6) Eyeball Diagram representing refraction power It is possible to print the refrection state diagram regarding the result of the REF measurement to the internal printer. This function will be performed when ‘PRINT=EYE : ON’ in the Page 3/4 of the SETUP MODE.
  • Page 77 76 Auto Ref/Keratometer HRK-9000A ------------------------------------------------------------------------------------------------ (a) EMMETROPIA/NORMAL (e) MIXED ASTIGMATISM (b) MYOPIA/NEAR SIGHTEDNESS (f) HYPEROPIA / FAR SIGHTEDNESS (c) SIMPLE MYOPIC ASTIGMATISM (g) SIMPLE HYPEROPIC ASTIGMATISM (d) COMPOUND MYOPIC ASTIGMATISM (h) COMPOUND HYPEROPIC ASTIGMATISM Diagram of the eye ball output by REF Measurement...

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