Detailed Description  Power range: 0.00~+3.00/ADD+1.00~+3.00  0.00~-3.00/ADD+1.00~+3.00 We also produce : 1.56 photochromic finished lens :single vision , round-top bifocal , flat-top bifocal , invisible , progressive lens,  1.56 photochromic semi-finished lens :semi-finished single vision , semi-finished round-top bifocal , semi-finished flat-top bifocal , semi-finished progressive , semi-finished invisible  1.499 CR39 :single vision , round-top bifocal , flat-top bifocal , progressive etc 1. The lens is suitable for businessman & office lady. 2. Can replace sunglasses and fits all people no matter they are myopic or not. 3. Suitable for both outdoor and indoor ,and people do not need to change the glasses. 4. The color changing and fading speed of the lens is much faster than other lenses.