1.49 CR39 Optical Lens
Author: Shako12,10,2020Views: 2240
1.49 CR39 is Glasses Lens ,1.49 is Refractive Index,Lens have 8 type of Index of Refractive.Like 1.49/1.56/1.523/1.61/1.67 and So on ,The higher the Refractive Index ,The thinner the lens for same degree.But The higher the Refractive Index ,The more uncomfortable it is to wear.1.49 another name is CR39 Lens materials is Resin.