This lens features refractive index of 1.56 and can be made into a finished and semi-finished lens. It is made of photochromic material and changes colors with the changes in the light intensity. This lens frees you from carrying a pair of sunglasses when exposed to UV radiation.

• Single vision: 70/65mm.
• Blended bifocal: 28/70mm.
• Round bifocal: 28/70mm.
• Flat-top bifocal: 28/70mm.
• Progressive: 14/70mm.