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a. Centering a mid-distance lens using re-marked micro-engravings
Mark the micro-engravings present on the lens.
Mark the near vision micro-engravings with a felt tip marker.
Remark each micro-engraving with a felt tip marker. The diameter of the dots must be between 0.5 and 1.5 mm.
If the manufacturer marking forms two circles around the micro-engravings, erase them before marking the lens with a
felt tip marker.
We advise you to use:
the white felt tip marker supplied with the tracer to mark the lens
an alcohol-based solution such as Essiclean to remove existing markings.
TM
Press to select the type of mid-distance lens.
Press to select automatic centering using re-marked micro-engravings.
Enter the half-PD and pupillary height for near vision.
Position the lens in the middle of the centering chamber.
The centering target is displayed:>
The target moves.>
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