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Mar 14, 2023 · Even without UV sunglasses, only about 1 percent of UV light hits the retina. In comparison, most blue light reaches the back of the eye. A specific type of blue light called high-energy visible light (HEV light) is emitted by electronic devices. The amount of rays coming from this kind of light is still lower than the amount emitted by the sun ...
Feb 27, 2019 · Blue light generally is defined as visible light ranging from 380 to 500 nm. Blue light sometimes is further broken down into higher energy blue-violet light (roughly 380 to 450 nm) and lower energy blue-turquoise light (roughly 450 to 500 nm). So, about one-third of all visible light is considered high-energy visible (HEV) or “blue” light.
- Blue light is everywhere. Sunlight is the main source of blue light, and being outdoors during daylight is where most of us get most of our exposure to it.
- HEV light rays make the sky look blue. The short-wavelength, high-energy light rays on the blue end of the visible light spectrum scatter more easily than other visible light rays when they strike air and water molecules in the atmosphere.
- The eye is not very good at blocking blue light. Anterior structures of the adult human eye (the cornea and lens) are very effective at blocking UV rays from reaching the light-sensitive retina at the back of the eyeball.
- Blue light exposure may increase the risk of macular degeneration. The fact that blue light penetrates all the way to the retina (the inner lining of the back of the eye) is important, because laboratory studies have shown that too much exposure to blue light can damage light-sensitive cells in the retina.
Feb 12, 2024 · Blue light is located in a narrow band near an outer edge of the visible spectrum, with wavelengths close to those of ultraviolet light. Blue light triggers your eyes to react, especially the lens ...
As blue light is the closest visible light to ultraviolet light, its effects on the retina are more potent than lower-energy wavelengths. In nature the most obvious source of blue light is sunlight. Thus, exposure to sunlight plays an important role in maintaining circadian rhythm cycles and mood.
Studies have been conducted on blue light filtering eyeglasses, [5] [27] which uses special blue light blocking lenses for eye protection against blue light. [ 27 ] [ 28 ] All visible light wavelengths can be transmitted through the spectacle lens, [ 28 ] but some portions of the blue-violet light spectrum are selectively attenuated by coating the specifically-designed front and posterior ...
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Oct 19, 2023 · The strong energy of blue light is what allows it to pass easily through the cornea and lens of our eyes. Blue light has the shortest wavelength in visible spectrum, and therefore also has the most energy and is the most harmful. Prolonged exposure to this slowly deteriorates the retina. Limited exposure to blue light isn’t all that bad.
