EDIT: The green tint is becoming more obnoxious. This is not optical quality glass, I think.I chose these glasses because of the relatively large dimension side-to-side, and that worked out well, especially after I bent the frame at the hinge so that there was more room for my wide head.There is a slight but very noticeable green tint to the glass, undesirable, makes me think the quality of the glass is not what I'd like it to be.Purchased 2.5 diopter lens, progresses to some lesser magnificatioSee full review