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This pain in your eyes occur after being outdoors in the sun all day. It is caused by is caused by UV rays reflecting strongly off snow, is caused by UV rays reflecting strongly off of snow. Symptoms can include bloodshot eyes, teary eyes, gritty eyes, painful eyes.
What is snow blindness. Prevention is the key! Wear sunglasses on a sunny day. If condition occurs, place a cold towel on your eyes and spend time in dark room.