Sunglasses of excellent quality should first and foremost be able to fully protect the wearer’s eyes from dangerous ultraviolet rays, infrared light, and blue light. Naïve or ignorant buyers tend to believe that cheap look alike sunglasses with very dark lenses are capable of doing the job. Nothing could be further from the truth. The color or tint of lenses is not indicative of their ability to block these harmful light rays; it has to do with how the lenses are processed, how they are coated, and the materials from which they are made. All that a pair of cheap imitation sunglasses does is block some of the light, but none of the UV rays that can cause diseases like macular degeneration, photokeratitis, eye cancer, and cataracts.

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