Adjusting Sphere; Adjusting Cylinder; Adjusting Sphere And Cylinder Together; Adjusting Axis - Ametek Reichert Phoroptor VRx User Manual

Performing an Exam
The Basics
(continued)
16241-101 Rev. E
(continued)

Adjusting Sphere

1. Activate the Sphere value field.
2. Turn the CONTROL KNOB to adjust the Sphere value by ±0.25 D, or press
and turn the CONTROL KNOB to adjust the Sphere value by ±1.00 D per
click stop.
3. Press the CONTROL KNOB to move to the next step.

Adjusting Cylinder

1. Activate the Cylinder value field.
2. Turn the CONTROL KNOB to adjust the Cylinder value by ±0.25 D, or
press and turn the CONTROL KNOB to adjust the Cylinder value by ±1.00
D per click stop.
3. Press the CONTROL KNOB to move to the next step.

Adjusting Sphere and Cylinder Together

The Sphere and Cylinder values can be simultaneously adjusted to maintain
the spherical equivalent.
1. Select C, then select C again to highlight both S and C, to activate Spheri-
cal Equivalent.
2. Turn the CONTROL KNOB to adjust the Sphere and Cylinder values together.
A change of ±0.50 D in Cylinder power results in a corresponding ±0.25 D
change in Sphere power.

Adjusting Axis

1. Activate the Axis value field.
2. Turn the CONTROL KNOB to adjust the Axis value by 1°, or press and turn
the CONTROL KNOB to adjust the Axis value by 10° per click stop. The
actual position of the Axis is graphically shown on the display in the lens
aperture icon.
3. Press the CONTROL KNOB to move to the next step.

Near Vision Addition

1. Lower the Near Vision Rod and Card to automatically activate the Add field,
converge the Phoroptor, and darken the Acuity Chart screen.
Note: Make sure the reading rod is lowered. If the rod is not lowered,
"Convergence" displays at the top left of the screen and a "Beep" sounds.
2. Turn the CONTROL KNOB to adjust the Add value by ±0.25 D, or press
and turn the CONTROL KNOB to adjust the Add value by ±1.00 D per click
stop.
3. Press the CONTROL KNOB to save the value and exit Add mode.
4. Raise the Near Vision Rod and Card. The projector screen will illuminate again.
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