The function of sunglasses

Sunglasses are a type of glasses primarily used to filter out ultraviolet and strong sunlight during outdoor activities, protecting the eyes and avoiding eye diseases. The following are the functions of sunglasses:

UV resistance: Sunglasses' lenses can filter out ultraviolet radiation from the sun, especially UVB and UVA light with wavelengths less than 400 nanometers. UVB is a high-energy ultraviolet radiation that has strong photosensitivity to the eyes and may cause sun induced conjunctivitis or other conditions. Therefore, sunglasses can effectively protect the eyes from UV damage.

Relieve eye fatigue: Wearing sunglasses can effectively filter out excessive light that the eyes encounter, relax the eyes, and alleviate symptoms of eye fatigue.

Preventing eye diseases: Excessive exposure to ultraviolet radiation can cause inflammation of the cornea and conjunctiva, leading to eye diseases such as cataracts and macular degeneration. Sunglasses can effectively reduce eye pressure and lower the risk of eye problems.

Beauty benefits: Wearing sunglasses can block direct sunlight, reduce dark circles, protect the skin around the eyes, and have a protective effect on beauty.