Auto lens meter operation manual
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6、measurement of progressive lens (PPL)
To press the lens mode exchange key to enter into the PPL measuring
mode. During this measurement, the Memory key should be used. There are
two PPL measurement: non-edgered lens and lens with frame.
Figure 4.11 diagram of progressive lens
● Measurement of non-edgered lens
To mark the lens with the special eyes ports supplied by manufacturer
and make the lens convexity upward. In the near vision range, to keep the
horizontal reference line in horizontal and lock the lens. To measure the
far vision range first, and to move the lens up and down and from left to
right to make the drone just on the center of the cross line. When the drone
as the thicker cross (十), and to press the Memory key, the data of far
vision range be confirmed. Then to move lens till the near eyes ports on
the lens base, there will be ADD and measured data showed on screen, just
to press Memory to save it.
Summary of Contents for VIEWLIGHT DLR-700
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