Essilor Instruments ALM 500, User Manual, Page: 29 / 46

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6.5 6.5 6.5 6.5 Measurement of Progressive Lens Measurement of Progressive Lens Measurement of Progressive Lens Measurement of Progressive Lens
(1) Take a measurement of progressive lens.
Set “Auto
Auto Auto
Auto Prog.
Prog. Prog.
Prog.” and “ADD Meas
ADD Meas ADD Meas
ADD Measure
ure ure
ure” in reference to
the below.
Auto Prog.
Off : No auto judgment for a progressive lens
On : Auto judgment for a progressive lens
ADD Measure
F/N.AT : Auto memory of far and near points
N.AT : Auto memory of a near point
Manual : Manual memory of far and near points
(2) Switching to progressive lens measurement screen
The switch is changed to , and the progressive
lens measurement screen is displayed by pressing
(single/ progressive lens selection switch).
In case that Auto Prog Auto Prog Auto Prog Auto Prog is set as “On On On On”, the lens is automatically judged whether the lens is
a progressive lens or not.
Set the lens in the center region of the progressive zone. It starts the auto judgment of the
progressive lens. When the lens is identified as a progressive lens, the screen is switched
to the progressive lens measurement screen. If not, the measurement screen remains as
the single focus lens measurement screen.
When the ADD value is small (less than 1D), the auto detection may not be performed.
Also, if the progressive zone cannot be found at where the lens is set, the auto detection
may not be performed.
In these cases, move the lens back and forth, and right and left slowly.
、
When the ADD value is small (less than 1D), the framed lens is small, or the lens is dirty
or has some flaws, the far point and near point may not be detected automatically. In such
case, take a measurement manually.
NOTE
NOTE NOTE
NOTE