Zeiss has added poly Transitions Gray to its line of Gradal Brevity. This lens blank features a factory applied, scratch-resistant hard coating that is specifically optimized for photochromic lenses. The power range for this lens is +5.00 to -10.00 with cylinders up to -4.00 (total power not to exceed -10.00D)and adds from 1.00 to 3.00D. Minimum fitting height is 16mm.