Quick Answer
Exposure to bright snow can cause snow blindness in as little as 30 seconds to 1 minute, depending on the intensity of the snow glare and the individual's sensitivity.
Causes of Snow Blindness
Snow blindness, also known as ultraviolet (UV) keratitis, occurs when the high concentration of snow reflects UV radiation from the sun, damaging the cornea and causing eye pain, blurred vision, and even temporary blindness. The most significant risk factor for snow blindness is prolonged exposure to direct sunlight on snow, particularly at high elevations or near the equator where the sun’s rays are strongest.
Symptoms and Treatment
The symptoms of snow blindness can be severe and may include intense eye pain, sensitivity to light, blurred vision, and even temporary loss of vision. If you suspect you have snow blindness, seek shade immediately and rest your eyes. Apply a cold compress to reduce pain and inflammation, and use eye drops to lubricate the eyes. In severe cases, medical attention may be necessary to prevent permanent damage. The treatment for snow blindness typically involves rest, hydration, and pain management.
Prevention and Precautions
Preventing snow blindness is easier than treating it. Wear sunscreen with a high SPF rating, and consider using UV-blocking goggles or glasses with a wraparound design to protect your eyes from the sun’s rays. If you’re venturing into the snow, try to avoid direct sunlight between 10am and 4pm, when the sun’s rays are strongest. You can also use a hat with a brim or a parasol to provide additional shade for your face and eyes.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.