Glasses that someone uses not only sweeten their appearance. More than that, glasses also have health functions that should be realized by the wearer. Using glasses is a way to treat the eyes and not a tool that works to cure vision. One function that is often forgotten is the function of protecting the eye from damage that can be caused by ultraviolet light. Danger of Ultraviolet Rays Exposure to ultraviolet light for a period of time in the eye not only can cause damage to the surface of the skin of the eyelid. Parts of the eye, such as the cornea, lens, and retina also have the potential to suffer damage. In fact, ultraviolet light is thought to play a role in the onset of pterygium, cataracts, and macular degeneration. Exposure to ultraviolet light directly that hits the cornea of the eye even risks causing keratitis. This condition is an inflammation of the cornea that gives a sore and swollen sensation in this part of the eye. Sunbathing too long in the sun or ultraviole...