Nidek Medical LM-7, Operator'S Manual

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3. OPERATING PROCEDURE : Progressive Power Lens Measurement
●
When auto read does not function properly
Measure the point that is closest to the near portion and perform auto read.
1)
Measure the distance portion of the lens with the auto read function until the target changes from
to (cross).
2)
After the measurement, leave the lens table as it is
and move the frames toward the operator. At this
time, make sure that indicators for near portion
are not displayed to the right or left of the target.
When the near portion cannot be detected and the
bottom of the frame begins to contact the nosepiece,
moving the frame so that the nosepiece is positioned
about one third back (measurement point) allows
near portion auto read to function.
Maximum addition power is automatically detected from a part of near portion on the nosepiece.
❖
For the measured data obtained here, the near portion is not intact. It is the power remaining
in the lens being measured and not an estimation of the near power that the lens originally
had.
• Even when the Near auto read parameter is set to “Off”, auto read functions if the near portion is
not intact.
• The measuring method is the same as normal lenses, however, note the following.
• When moving down the lens, make sure that indicators for near portion are not displayed to the
right or left of the target.
• If auto read is performed while the lens is shifted to the right or left, addition power is underesti-
mated.
• Perform alignment with the lens covering more than half of the nosepiece.
• If the lens comes off a large portion of the nosepiece, the error message “Measurement error”
appears.
• It is not possible to determine to what extent the addition power is not intact from that originally
designed.
Consider that the addition power obtained with this function is lower than actual.
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