Help!
A few weeks ago, I attended a seminar and jotted down a formula for determining lens thickness. I suspect I wrote something incorrectly as I am not coming up with logical answers. Does anyone know of a formula. In the formula I was given, I had to take in to account Index of Refraction, Decentration, RX, Radius and Center Thickness (if a minus lens) or Edge Thickness (if a plus lens). I thought it was a great formula because these are all variables that I would know at the time of order (having to know curves and sag. values ect. would NOT work).
I hope someone can help. I appreciate the feedback.
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