What are the best eyeglass lenses that change to dark shade ?
Photochromic,Transitions,Glass ,Plastic .I dont want heavy glass and one that change CLEAREST indoor and VERY DARK outside.WHich is best. Do they already have UV protection, ANTI-glare protection and scratch protection or do you pay extra for each protection. Can anyone simplfy this and help me get whay IM looking for and not pay extra for features that are already on the lens. Also what is CRISAN.
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