27
USING THE INSTRUMENT
2 Marking a cylindrical axis
Match the center mark with the target image, approximating the axis angle mark to 180
degrees.
Adjust A of the axis angle to 180 degrees.
MARKING A LENS WITH PRISM POWER
• When the prescription is displayed with X-Y
(orthogonal coordinates):
Select .
Carry out aligning according to the prism value as
prescribed and as displayed on the screen.
in prism value: Base In
in prism value: Base Out
in prism value: Base Up
in prism value: Base Down
• When the prescription is displayed with P-B (polar
coordinates)
Select .
Carry out aligning according to the prism value as
prescribed and as displayed on the screen.
P: Prism value
B: Base orientation
Check here
Axis angle mark (every 5°)
Adjust to 180°.
Axis angle mark (every 5°)
MENU/PRISM/X-Y
MENU/PRISM/P-B
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