150 Digital Refractor CDR-9000
13.10. Cylinder Power Test
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Objective: To obtain the maximum corrected monocular CYL value during the
subjective test the Clock Dial chart.
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Expectation: All the rods on the screen can be seen uniformly clear.
1. This test should be done after setting the Cylinder Axis. Alternately, press
the [TEST] button and then select “Cylinder Test-Power” Item of the touch
screen to execute this test
2. Press [R] or [L] button to select desired field.
3. Press the Clock Dial chart to Change into astigmatism Measurement
4. To enter the Cylinder Power mode, press the Clock Dial chart one more ti
me or press the [C] button in astigmatism mode or press the [SHIFT] butt
on and the Clock Dial Chart at a time.
5. Turn the dial in “-“ direction until all rods are seen even. At this time, the
location of the thickest-looking rod can be changed. If then, adjust the A
xis according to the following procedure.
6. Decrease the Axis value if the thickest-looking rod moves counterclockwise.
7. Increase the Axis value if the thickest-looking rod moves clockwise.
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