What is Blue Light?

 

Blue light, part of the visible light spectrum, is emitted from the sun and artificial sources including digital screens and fluorescent lights.

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What is Blue Light?

Blue light, part of the visible light spectrum, is emitted from the sun and artificial sources, including digital screens and fluorescent lights.

Blue light refers to a range of wavelengths on the visible light spectrum, which includes varying shades of red, orange, yellow, green, and blue light emitted from the sun. The red end of the visible light spectrum has longer wavelengths of as high as 700 nanometers and relatively low energy levels. At the opposite end of the spectrum is high-energy blue light with wavelengths as short as 380 nanometers and as long as 500 nanometers. Beyond visible blue light are ultraviolet (UV) rays, which cannot be seen by the eye, which have even shorter wavelengths and higher energy than blue light.

The sun is the primary source of blue light, but blue light can also be emitted from sources including digital screens and fluorescent lights.

Foster Grant® Blue Light Glasses and Reading Glasses

Foster Grant® blue light glasses and reading glasses filter at least 30% of potentially harmful blue light.* Additionally, all blue light styles have 100% UVA-UVB lens protection.

*Potentially harmful blue light refers to the 415-455 nanometer range of the visible light spectrum. The percentage represents the average amount of potentially harmful blue light filtered at 5 nanometer increments in this range. With the exception of Eye Gear™ Gaming Glasses, covered under U.S. Pat. No. 8,360,574. Other U.S. and foreign patents pending.