Studies have shown that permanent damage to the eyes can result from prolonged exposure to the sun without adequate protection. Ultra violet (UV) light is the component of sunlight most responsible for eye damage. Excessive exposure, especially from light reflected from water, sand, snow or pavement, can produce a burn on the surface of the eye. Like a sunburn on the skin, eye surface burns are usually painful, but temporary. Of more concern is the cumulative damage of repeated exposure that may contribute to chronic eye disease. UV exposure can affect not only its surface, but also its internal structures (the lens and retina).

            A good pair of sunglasses should curve towards the sides of the face to allow for maximum protection. As for the colors of the lenses, they can be chosen according to the wearer’s preferences. Gray will allow for the most natural vision, although clarity will diminish in dim lighting; green lenses will warp vision of natural colors; and brown or amber lenses will not change colors much, but will greatly help with clarity of vision.