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But you can choose from dozens of top options, everything from solid colors to holiday themes to "sun tops" (which effectively turn your glasses into sunglasses — regular tops are just frames ...
As lighting conditions change, for example when the user goes from indoors to outdoors, the brightness ratio also changes and can cause undesirable vision impairment. An attractive solution for overcoming this issue is to incorporate dimming filters into smart sunglasses which control the amount of ambient light reaching the eye.
Typical sunglasses lenses are tinted for protection against bright light or polarized to remove glare; photochromic glasses are clear or lightly tinted in dark or indoor conditions, but turn into sunglasses when they come into contact with ultraviolet light. Most over-the-counter sunglasses do not have corrective power in the lenses; however ...
Any of the above features, color, polarization, gradation, mirroring, and materials, can be combined into the lens for a pair of sunglasses. Gradient glasses are darker at the top of the lens where the sky is viewed and transparent at the bottom. Corrective lenses or glasses can be manufactured with either tinting or darkened to serve as ...
Throughout history, progression of the sunglasses began to change to serve more as a fashion stable, than eye wear for sun protection. The term "Sunglasses" began being used around the 1900s. Before then, sunglasses were being used for more extreme weather conditions, like for polar explorers or for people visiting equatorial colonies. [1]
These sunglasses later evolved into aviator sunglasses, and the resulting name and brand, Ray-Ban, became synonymous with army pilots and later on a fashion item. [ 18 ] [ 19 ] Foster Grant continued contributing to the growth of the eyewear industry for fashion by running large campaigns featuring celebrities.
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