Author:  John Winkler, M.D. Educational Pearls Photokeratitis is a UV burn of the sclera and cornea, which can cause blindness. UV light causes eyelid swelling with diffuse scarring of the eye (widespread, punctate uptake of fluorescein dye). While this can eventually heal, it is incredibly painful. Snow reflects light underneath sunglasses, so wrap-around goggles are the best form of prevention. This can happen to welders, sunbathers or any other person with prolonged UV light exposure.  References: https://emedicine.medscape.com/article/799025-treatment