protect the eyes from ultraviolet radiation
Sunglasses recommended whenever a person is in the sun to protect the eyes from ultraviolet radiation. Its usage is compulsory immediately after some surgical procedures. It is also recommended for a certain time period in dusty areas, and in front of a TV screen or computer monitor. Since the 1940s, sunglasses have been popular as a fashion accessory. Now a days we all are wearing glasses in many forms all over the world.
Sunglasses are a form of protective eyewear designed primarily to prevent bright sunlight. Or preventing high-energy visible light from damaging or the eyes or eyesight. They can sometimes also function as a visual aid, termed as spectacles or glasses. Glasses made from celluloid were first produced by Sam Foster in 1929.