Photokeratitis refers to temporary, painful eye damage from exposure to ultraviolet (UV) light, such as the sun and its reflection, welding arcs and lights used for medicine. Treatments include home remedies like cold compresses and over-the-counter pain relief.
Photokeratitis is a painful eye condition caused by exposure to ultraviolet (UV) rays, most commonly from the sun. You can compare photokeratitis to sunburn, but it’s a burn that affects parts of your eye instead of your skin. It’s generally bilateral (affects both eyes).
Exposure to UV rays can cause damage to both the cornea and conjunctiva of your eye. In addition to the sunlight or reflected sunlight, other sources of UV rays include welding arcs, tanning equipment and lights used for medicine.
Sometimes, people call this condition a name that reflects the cause. For instance, snow blindness is a type of photokeratitis that occurs when snow and ice reflect UV rays. It’s more common near the North and South Poles or in mountainous regions where the air is thinner and provides less protection against UV rays. People who get photokeratitis from welding may say they have arc eye or welder’s flash.
Photokeratitis can be acute or chronic.
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If you have photokeratitis, you may experience one or more of the following symptoms:
Other symptoms include:
The symptoms may last from six to 24 hours, but they usually disappear within 48 hours. The longer you’re exposed to UV light, the more severe your symptoms might be.
Ultraviolet rays can damage your eyes. UV-A and UV-B rays from the sun can cause short- and long-term damage to your eyes and affect your vision. The ozone layer absorbs UV-C radiation, so those rays don’t damage your eyes.
Besides direct sunlight, other sources of ultraviolet light that can cause photokeratitis include:
Staring directly at the sun, such as during a solar eclipse, can cause more long-lasting and considerable damage — a burn — to your retina.
You’re at greater risk of getting photokeratitis if you:
Long-term exposure to even small amounts of UV radiation can increase your risk of developing a cataract or macular degeneration. UV exposure adds up over time. Long-term UV exposure can also cause tissue elevations on the surface of your eye. These are called pingueculae and pterygia. Using sunglasses faithfully when outdoors may limit these.
Blue and violet shorter-wavelength visible light, emitted from LED lights, computers and smartphones, can also be harmful to your retina and be a risk factor for macular degeneration later in life.
Your provider will put drops with fluorescein into your eye and then perform a slit lamp exam. Fluorescein is a dye that can reveal irregularities on the surface of your cornea.
If you experience symptoms, go indoors immediately. Stay in a darkened room. Remove your contact lenses if you wear them. Don’t rub your eyes.
Your provider may suggest these types of home remedies:
Usually, the condition goes away on its own within a few hours to days. If medical treatment is necessary, your doctor may prescribe eye drops to prevent infection.
Seek medical attention if you experience a loss of vision or pain that lasts for more than two days.
You can prevent photokeratitis by:
The good news about photokeratitis is that it’s almost always a temporary condition, and your symptoms usually go away within a few hours to a couple of days. You can relieve most symptoms with at-home remedies.
You may need to stay inside for a day or so while you recover.
If you have symptoms of eye pain or vision loss after being outside or being around UV rays, you should contact a healthcare provider. Let them know that you were around sources of UV light, such as the sun or welding equipment. Your provider is the best person to decide if your symptoms are those of photokeratitis or not.
Your provider can suggest things you can do at home to help yourself and can advise you when you need to get medical attention.
Photokeratitis is a painful, but temporary eye condition. Preventing photokeratitis is easy — always wear sunglasses or other eye protection that blocks or absorbs UV rays when outside (even on cloudy days) or when you’re exposed to certain light sources at your job. Visit an eye specialist once a year to stay up on your eye health and catch any eye problems early.
Last reviewed by a Cleveland Clinic medical professional on 11/07/2023.
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