Cross Cylinder - Smart Test (continued)
Programmed Cylinder Power Adjustment
1. Turn the CONTROL KNOB to adjust the Cylinder power.
2. Present the patient with positions 1 and 2.
• The Cylinder power adjustment is performed in pre-programmed steps.
• The Cylinder power initially changes in ±0.50 D increments, and then refines to ±0.25 D
changes.
• The Spherical equivalent is maintained during the entire Cross Cylinder test.
• You can also touch the ±0.25 D, ±0.50 D, or ±1.00 D screen icon to control the amount of
Cylinder power adjustment.
3. Ask the patient: “Which is better (sharper and clearer), 1 or 2?”
4. Press the ENTER button, or touch EQUAL on the screen, to enter the patient’s preferred
position and end the test.
Note: If the patient goes back and forth in a ±0.25 D change in power, select a position and end
the test.
Freely Selectable Cylinder Power Adjustment
It is possible to adjust cylinder beyond whatever increment was selected for the Cylinder adjustment
(±0.25 D, ±0.50 D, or ±1.00 D). Turn the CONTROL KNOB eight (8) click stops in one direction when
offering position 1 or 2 to the patient. After the eighth (8
th
) click stop, the cylinder changes in 0.25D
increments. This allows the user to freely modify the Cylinder.
Instructions for Use (continued)
71
16241-101 Rev. D
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