Hello everyone :), I am in prep for my boards, and have a few questions for my optician friends. My first question is, If measuring the distance between prism reference points in a pair of bifocals, is this point the distance between pd's?
Hello everyone :), I am in prep for my boards, and have a few questions for my optician friends. My first question is, If measuring the distance between prism reference points in a pair of bifocals, is this point the distance between pd's?
The PRP on most PAL's is exactly in between the two lazer 180 engravings. Use a PAL cut-out chart to locate.
Thank you for the info on the progressives, but I was asking on a pair of bifocals :)
With segmented/or SV lenses you'll read the prism at the correct pupillary height/inset.
Yes. Transfer to the lenses...Originally Posted by Cmp21
http://2.bp.blogspot.com/-80VJyx0yzZ...1600/prog3.png
... positioned in the lensometer using the alignment marks on the lens stop.
Best regards,
Robert Martellaro
Roberts Optical Ltd.
Wauwatosa Wi.
www.roberts-optical.com
~~~~~~~~~~~~~~~~~~
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
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