Snow has reflective qualities that send more UV rays into your eye — that's how we get the term “snow blindness.” Water and white sand can also cause photokeratitis because they're very reflective. Severe cold temperatures and dryness can also play a part, making photokeratitis more common in higher elevations.

Can you go blind from looking at the snow?

Snow blindness, a common form of photokeratitis, is a medical condition caused by overexposure to UV rays. People who develop snow blindness often spend several hours out in the snow without proper eye protection. Snow and ice can reflect UV rays into the eyes, resulting in a burned cornea.

Is snow blindness permanent?

Similar to sunburned skin, the symptoms of Snow Blindness occur later on, after the damage is already done. Luckily, the damage isn't permanent, and symptoms usually improve within 24-48 hours.