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Moving the near portion to bracket, and press the reading button, the second add power (Ad2) of
near portion measurement complete.
As to trifocal, the measure step finished.
6.5 Measuring Progressive Power Lens
6.5.1 Measure uncut lens
Measure the vertex power of the lens at the mark of the far and the near printed on the uncut lens,
and measure it manually.
Place the progressive surface of the lens on the measuring holder, place the lens so the near
reference point of the lens is centered on the measuring holder, and press the reading key to
measure the near vertex power.
Keep the progressive surface of the lens facing the measuring holder, center the distance
reference point of the lens on the measuring holder, and press the reading key to measure the
distance vertex power.
The difference between the near vertex power and the far vertex power is the near additional
vertex power of the progressive lens.
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When placing the lens, its horizontal assembly baseline must be parallel to the Lens pushing
board, and try to align the center of the lens marking ring with the center of the light hole of the
measuring holder to make the measurement accurate.
6.5.2 Measuring framed lens
Measure a lens on PPL measurement mode or auto identification measurement mode.
Under auto identification measurement mode, when the lens on the lens support is detected as a
progressive power lens, the interface changes to the PPL measurement interface automatically,
the procedure is as follows:
Distance reference markings
Near reference point
Horizontal assembly baseline