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a. Centering a progressive lens using re-marked micro-engravings
Mark the micro-engravings present on the lens. To do this, you have two options:
First option:
Mark the micro-engravings while keeping the original marks:
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
Second option:
Mark the micro-engravings after having removed all original marks:
Remark each micro-engraving with a felt tip marker. The diameter of the dots must be between 0.5 and 1 mm.
Around the two micro-engravings, draw a circle with a diameter of 5 to 10 mm.
Keep or redraw the near vision area.
Make sure you close the circles and that they are not too small (minimum diameter 5 mm).
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 progressive lens.
Press to select automatic centering using re-marked micro-engravings.
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