How Sunlight Damages the Eyes
Although the eyelid is designed to protect the eye, its skin is exceedingly thin and contains many fragile tissues that may be injured by UV light. Inside the eye, the lens and the cornea, both transparent, filter UV rays, but by doing so for many years, they may become damaged. This is especially true for the lens, which through years of UV absorption, turns yellowish and cataractous. The lens is the eye's transparent focusing mechanism, located between the iris and the vitreous humor (the clear, thick gel in the posterior compartment of the eye that fills the space between the lens and retina, giving the eye its form and shape). The cornea, the transparent area in front at the outer layer of the eye, admits light and images to the retina. UV damage is instrumental in causing:
https://www.skincancer.org/prevention/sun-protection/for-your-eyes/how-sunlight-damages-the-eyes
