Instructions for Use (continued)
Near Vision Test (continued)
The Near Vision screen provides you with three modes of operation, detailed in the following sections:
(Please refer to Figure IU-22.)
Fused Cross Cylinder Test
1. Select the Cross Grid Chart on the reading card.
Note: The Fixed Cross Cylinder lenses (+0.50 D, Axis 90°) are placed in the lens apertures.
2. Ask the patient: “Which is better (sharper and clearer), the horizontal or the vertical lines?”
3. Turn the CONTROL KNOB to add plus (+) power.
4. Repeat steps 2 and 3, until the patient states that the horizontal and vertical lines appear equally
sharp and clear, or the opposite lines appear sharper or clearer.
5. Press the CONTROL KNOB or ENTER button, or touch EQUAL, to save the values.
Figure IU-22, Cross Cylinder - Near Vision Test Screen
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16241-101 Rev. D
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