On a standard progressive, is the reading area decentered 2mm O.U. or 2.5mm O.U.?
Many thanks,
Golfnorth
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On a standard progressive, is the reading area decentered 2mm O.U. or 2.5mm O.U.?
Many thanks,
Golfnorth
2mm, for adds less than +2.75. The premium semifinished have variable insets depending on distance power. The early Varilux used 2.5mm due to an assumed 14" work distance.Quote:
Originally Posted by Golfnorth
Hope this helps,
Robert Martellaro