b'lenticular thinning / prism thinning / LPESIs a process that minimizes lens thickness and weight.It is designed to provide an optimal optical visual area, while incorporating a digital algorithmthat blends the surface curvature towards the edge to reduce the thickness of the final lens.Reduces up to 4mm of edge thickness on Minus lenses and center thickness on Plus lenses. Perfect for progressive wearers. Minimal decentration advised for Single Vision.WITHOUT THINNINGo = 7.7; 14 grams o = 7.7; 14 grams WITH THINNINGe = 1.5; E = 7.0 e = 1.5; E = 7.0o = 4.7; 9 grams o = 4.7; 9 gramse = 1.5; E = 3.8 e = 1.5; E = 3.884'