glass photochromic lens 1. We have 1.523 1.70 index mineral lens. 2. mineral lens SV,Bifocal,or photochromic lens glass photochromic lensWe have mineral lens as the following.1.1.523 white lens, single vision, flat top , progressive.2.1.523 photochromic single vision , flat top ,progressive.3.1.70 white lens,single vision.