Nidek Medical LE-9000DX Express, Operator'S Manual

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4.4 Blocking Lenses
The blocking position of the suction cup varies with the layout mode (Active mode, Bifocal
mode, Passive mode).
4.4.1 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 the NIDEK Auto
lensmeter for this purpose.
2. Block the convex surface of the lens with a
suction cup.
The cup has the blocking direction as shown
with the top mark.
Be careful not to block the wrong side up,
especially for dual-tone colored lenses.
It is recommended to use the NIDEK centering
device Model CE-1 for blocking.
NOTE
• For blocking a polycarbonate lens, be sure to use a lens cup in order to prevent the cup
from moving during processing.
4.4.1.1 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