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4.5 Blocking Lenses
A blocking position of the suction cup varies with the layout mode (Active mode, Bifocal mode, Passive
mode).
4.5.1 Blocking in active mode
1. Mark at the optical center of a lens with a
lensmeter.
When a lens has cylinder power, align the
cylinder axis angle of the lens to the prescription
value before marking.
It is recommended to use NIDEK Auto
lensmeter for this purpose.
2. Block the convex surface of the lens with a
suction cup.
The cup has blocking direction as shown with
the top mark.
Be careful not to block the wrong side up,
especially for dual-tone colored lens.
It is recommended to use NIDEK centering
device Model CE-1 for blocking.
NOTE
• For processing a polycarbonate lens, be sure to use a lens cup in order to prevent the
cup from moving during processing.
4.5.1.1 Blocking progressive power lenses
Block a lens with a centering device on the eye
point for far vision, which is printed on the lens.
Cylinder axis
<Up side>
Eye point for far vision
Summary of Contents for LE-9000LX
Page 1: ...PATTERNLESS EDGER Model LE 9000LX OPERATOR SMANUAL ...
Page 17: ...2 9 Top view or or ...
Page 19: ...2 11 ...
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