Ametek Reichert Phoroptor VRx User Manual page 52

Performing an Exam
Cross Cylinder
Smart Test
(continued)
8. Turn the CONTROL KNOB to present position 1 and position 2 to the patient. The amount of Cyl
change is indicated in the lens aperture at the top of the screen.
9. Ask the patient: "Which is better, 1 or 2?"
10. If the patient states a preference, tap 1 or 2 on the screen, or turn the CONTROL KNOB to that
number and press the button.
11. Repeat steps 8 - 10, until the test automatically finishes.
Note: Turn the CONTROL KNOB eight (8) click stops in one
direction when offering position 1 or 2 to the patient. After
the eighth (8 ) click stop, the cylinder changes in 0.25D
th
increments. This allows the user to freely modify the
Cylinder.
Note: Tap Undo at the bottom left of the screen to undo a step in the Cross Cylinder test.
52
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16241-101 Rev. E