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2. Sunglasses - Wikipedia

   en.wikipedia.org/wiki/Sunglasses

   Lenses of fixed tint are graded according to the optical density of the tint; in the UK sunglasses must be labelled and show the filter category number. Lenses with light transmission less than 75% are unsuitable for night driving, and lenses with light transmission less than 8% (category 4) are unsuitable for driving at any time; they should ...

3. Biological effects of high-energy visible light - Wikipedia

   en.wikipedia.org/wiki/Biological_effects_of_high...

   Lenses that filter blue light have been on the market for a long time in the form of brown-, orange-, and yellow-tinted sunglasses. [34] These tinted lenses were popular for the belief that they enhanced contrast and depth perception, but after early research showing the health risks of blue light exposure, [35] [36] became more popular for the ...

4. Color blind glasses - Wikipedia

   en.wikipedia.org/wiki/Color_blind_glasses

   Most lenses are intended for red-green color blindness, though some lenses are also marketed for blue-yellow color blindness. All lenses are passive optical filters, so can only subtract/attenuate selective wavelengths of light. However, there are large variations on this theme: Disparate lenses: using different filters over each eye

5. Glasses - Wikipedia

   en.wikipedia.org/wiki/Glasses

   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 ...

6. EnChroma - Wikipedia

   en.wikipedia.org/wiki/EnChroma

   EnChroma lenses are composed primarily of an optical notch filter that selectively filters wavelengths of light in the part of the spectrum where the M- and L-opsin sensitivities overlap, namely 530-560 nm, thereby removing light that excites both opsin types and decorrelating the signals between the M- and L-cones.

7. Randy Moss explains why he is wearing sunglasses on ... - AOL

   www.aol.com/sports/randy-moss-explains-why...

   In the video, Moss added that ESPN insider Adam Schefter called the pair of blue-tinted sunglasses "Michigan turnover glasses" — a timely joke in the wake of Michigan's win over Ohio State on ...