1. Material: NC-15R 2. Index: 1.56 3. Abbe Number: 38 4. Gravity: 1.24G/cm3 This lens is slightly thinner than the preferred and much stronger 1.499 index standard CR-39;
It's value becomes evident when MID range prescriptions are fitted into full rimmed frames;
1.56 index lenses usually have a slightly flatter curve giving a cosmetically more flatttering appearance.
Size: 65mm, 72mm
Size: 65mm, Power Range: +0.25~+6.00
Size: 72mm, Power Range: -0.25~-10.00
Size: 65mm Power Range: DS(+0.25~+6.00) DSC(-0.25~-2.00)
Size: 72mm Power Range: DS(-0.25~-8.00) DSC(-0.25~-2.00)