5-4
5.1 TROUBLESHOOTING GUIDE
Cause 3: The near point area in a small frame lens may be positioned
very near to the edge of the frame or even outside of the frame.
It may not be possible to detect the near point area in such lenses.
Action: Press HOLD button when judging the highest addition
value when the cursor is in the progressive zone.
4) The ADD Readings are Significantly Lower (> 0.5 diopters) than the Nominal
Values.
Cause 1: The far point area was not measured properly.
Action : With some lenses, the far point area may not be measured
accurately if AUTO HOLD mode is used. Disable the
AUTO HOLD mode in Setup (See Section 3.4, Setup
Menu 3), and measure the far point area manually. If it is
still difficult to measure, slightly move the lens back and
forth, right and left to measure the portion where
variation of SPH readings is minimum and press the
HOLD button.
Measurement Position of the Far Point Area
6 ~ 10mm
Fitting cross
Near power circle
Distance power circle
lens table
6 ~ 10mm
Center of the frame
Distance power circle
lens table
Single Lens Spectacle Lens
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