I was wondering if there are any resources on line for "marking up" progressive lenses? I used to work in optical (4 years as an optician) and I would like to help a friend make sure her lenses are sitting at the appropriate height so I need the template/guide to help me mark where the fitting cross is at.
The lenses are Essilor Naturals and I have been unable to find any "mark up" guides on my own. I realise that these things are probably not available on line, but I figured I would give it a shot.
I apologise if this ruffles any feathers etc., just tell me so and send me on my way.
Thanks!
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