When we say -6D is the ideal spherical back curve, does that refer to a 1.53 index lens?
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When we say -6D is the ideal spherical back curve, does that refer to a 1.53 index lens?
Hi. I'm working on a project, please check my math.
What is overall power if the intent were to make a spherical lens with the ideal back curve for equidistance to eye as it moves.
Back Curve...