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a. Centering a progressive lens using re-marked micro-engravings
Prerequisite:
Remove all the original markings,
Re-mark the micro-engravings with the marker; the diameter of points must be between 0.5 and 1.5 mm.
We advise you to use the white felt tip marker supplied with the centerer-blocker to mark the lens.
Centering the lens
Press to select the type of progressive lens.
Enter the half PD and pupillary height.
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 micro-engravings are:
Symmetrical in relation to the graduations,
Aligned on the line corresponding to the PRP of the lens.
The centering target is displayed:>
The target moves.>
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