I try to make one formula for Calculating the cutted lens Edge thickness. and Made one according to Spex and Darry forum. But I find that the formula are correct for negtive lens, but not for positive lens.
Thickness= [(1/2*Diameter)^2*Power / [2000*(Index - 1)]] + edge/center thickness
Lens Thickness Calculation Lens Width mm 50 Bridge mm 18 Both PD mm 68 Valided Diameter mm 52 Index 1.5 Sph 3.25 Cyl 1 MinCT Negtive Lens mm 1 MinET Positive mm 1 Negtive Lens thickness at 180°mm 3.197 Positive Lens thickness at 180°mm 3.197
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