Cheap Sunglasses, Fine Eyewear. Fine eye wear, designer frames for sunglasses and prescription glasses, from all over the world. This is a critical concern, since reduction of the visible light will cause your pupil to dilate, letting in more of the UV light. Excess exposure to UV light will damage the cornea , lens, and retina of your eyes. A variety of manufacturers have touted blue-blocking lenses as the best thing on the sunglass market.
Blue blockers remain controversial among vision experts.
The eye's focusing mechanism and depth perception may depend upon the full color spectrum range to orient itself. Red brake lights may appear farther away or nearer than they really are. For a few people, color shift can persist for up to 50 days after wearing them. We have tested some blue- blockers and they transmute the world into unreal colors, like orange pavement and blue water looks black. Worse is the fact that some people may have difficulty discerning one color from another, say green light from a red light.