Hi This is the first time I've posted , but I've been an avid reader
of Optiboard for awhile. That said, I have a question. It's almost too basic and I'm embarassed. I recently went to a continuing ed program in my home state (NY) and during a lecture the speaker asked where we would take a base curve measurement, front or back surface of the lense. No one answered and she went on to say great! of course we all knew it should be the back. Since you now know that I've read this web site for months and never posted, you know I didn't dare ask why all these years I thought base curves were taken from the front. Can someone please explain. I'v done a little research on my own. My notes from school say front , and do several published books. What I'm I missing?
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