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Transitions lenses are eyeglass lenses that are specially treated to react to the amounts of ultraviolet rays to which the lens is exposed. The higher the ultraviolet ray level, the
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Transition lenses have different concavities on the top and bottom of the lens, like a pair of bifocals without the line. This allows the user to see close up by looking through the
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1. Put on your glasses with the transition lenses, while inside. 2. Go outside and step into the sunlight. 3. Wait for about one minute for the lenses to fully darken. 4. Walk around
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Transition lenses are photochromic optical lenses that darken when exposed to ultraviolet light. Originally it was only available in a heavy glass lens, but in 1990, lens manufacturer
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