Centering the lens
Press to select the type of bifocal lens.
The centering target is displayed:
Enter the half PD for near vision and the frame height.
The target moves.
Lower the tube.
Insert the posiblock and its pad in the centering device.
Raise the tube back into centering position.
Position the lens on the tube, with the convex side on the tube.
Move the lens slowly until the top of the segment is in the center of the target.
D-SEGMENT ROUND SEGMENT
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