Blue light is high-energy light in the visible electromagnetic energy spectrum. Some intense forms of blue light have similar frequencies to ultraviolet light and can penetrate the eye and reach the retina. The main source of blue light
is the sun, but indoor artificial lighting, smartphones and other digital devices also emit blue light.

Blue light glasses are a great idea for children and teens who spend a lot of time in front of screens, especially at night. A University of Houston study found that participants who wore blue-light glasses had a 58 percent increase in
nighttime melatonin levels.

This finding is relevant to children and teens who work efficiently in front of screens at night, and blue-light glasses are effective in reducing alertness and inducing melatonin production in healthy teenagers, thereby improving their
circadian rhythms.