Ultra-violet and Blue Light
Ultraviolet and blue light can have a harmful effect on the eyes. The portion of the invisible light spectrum below 286nm and 400mn is considered harmful for eyes, and it can lead to serious eye disorders such as cataracts and macular degeneration.
The retina is vulnerable to this light, and three types of retinal damage, including structural thermal and photochemical, can be observed depending upon the wavelength of light, power level, and exposure timing.
The UV light can be emitted from the sun and other sources, including fluorescent lighting, video display terminals, and welder’s flash. Although Taking sunlight is good for health, but too much sunlight can have a damaging effect on the eyes due to the rays being emitted by it.