The UV rays of the sun don’t just damage your skin. They can damage your eyes as well.

There are three types of UV rays: UVC, UVB, and UVA. UVB rays are usually what causes the most significant damage to the eyes and skin. (Learn More)

It can be difficult to detect when the sun might be damaging your eyes, but if your eyes are hurting as you look near the sun (even if you’re not looking directly at it), it could be the sign of a problem. Ultraviolet keratitis is a generally temporary condition that can result from staring at the sun too long, causing a variety of eye issues.

In the long term, if your eyes are exposed to too much sunlight, it can lead to cataracts and other eye diseases. It can even lead to cancer.(Learn More)

Reversing sun damage is not always possible. If the damage is not severe, you should give your eyes a break from the sun if you are concerned. Adopt better practices to protect them,  and do not go out when it is sunny unless necessary. If your damage is serious, you may need surgery to correct it. In some cases, the damage may be irreparable. (Learn More)

Avoiding sun damage to your eyes in the first place is the best way to prevent serious issues. Wearing a hat and sunglasses when going out in the day, especially if you will be outside for a long time, is the best solution to avoiding eye damage.

While you’re adopting safe practices, remember to properly protect your skin with sunscreen. (Learn More)

Sun Damage

photophobia

The sun is a relatively powerful source of ultraviolet (UV) radiation, which can cause damage if you are not careful. At its worst, overexposure to UV rays can increase your risk of developing a number of eye diseases, including cataracts, growths on the eye, and cancer.

There are three categories of UV radiation to take into consideration.

  • UVC: While these type of rays have the highest potential for harm in theory, the earth’s ozone layer blocks virtually all of them. The depletion of the ozone is the only reason we are exposed to this type of radiation.
  • UVB: Only partially filtered out by the ozone layer, these slightly weaker rays are what creates a suntan. In high doses, they can cause a number of issues for your skin and eyes.
  • UVA: These weak rays of UV radiation are not as frequently associated with major eye or skin problems; however, they can pass through the cornea. Evidence suggests they may cause some types of cataracts and macular degeneration.

Symptoms

The risk that the sun will damage your eyes is cumulative. The longer you spend with your eyes exposed to UV rays, the greater the risk of an issue.

It may not always be obvious when you are being exposed to too much sunlight. One simple rule of thumb to follow: If you are looking anywhere near the sun and it is hurting your eyes, you are being overexposed.

Perhaps one of the most obvious signs you have been overexposed to the sun is if you develop ultraviolet keratitis. This could be compared to sunburn of the cornea, with symptoms generally lasting from 6 to 24 hours, although they can last as long as 48 hours. Symptoms include the following:

  • Discomfort or redness in the eyes
  • Tears
  • Blurry vision
  • Swelling
  • Light sensitivity
  • Eyelid twitching
  • Gritty feeling in the eyes
  • Short-term loss of vision
  • Seeing halos

If you are experiencing serious vision loss or any loss of vision that does not improve in a few hours, contact a specialist to make sure your eyes are okay.

Again, cumulative long-term exposure to solar radiation increases your risk for a number of eye diseases. The most common are macular degeneration and cataracts, but cancer and eye growths are also possibilities.

Reversing Sun Damage

eyes squinting from the sun

Damage to the eye can sometimes be permanent or at least semi-permanent, with some symptoms fading but not completely. If you have any reason to believe your eyes have been overexposed to the sun (which is common with people who are often outdoors, such as farmers), you should wear sunglasses and a hat regularly. This ideally will give your eyes time to heal.

Also, see a specialist and see what your options are. Depending on the severity of your damage and your particular situation, surgery to improve your vision may or may not be an option.

Avoidance Is Key

Rather than risk permanent damage, it is best to learn to avoid overexposure to the sun. Familiarizing yourself with the UV index can help you stay safe.

  • UV 2 or less: Wear sunglasses, and consider sunscreen.
  • UV 3-5: Wear sunglasses, cover up, use sunscreen, and avoid the sun when it is strongest at midday.
  • UV 6-7: Wear a hat and sunglasses, cover up, and use sunscreen. Avoid the sun if possible between 10 a.m. and 4 p.m.
  • UV 8-10: Follow the same guidelines as UV 6-7.
  • UV 11+: Wear a hat and sunglasses, and reapply sunscreen (SPF 15+) every two hours. Try to totally avoid sun exposure between 10 a.m. and 4 p.m. if possible.

Broadly speaking, wearing sunglasses and a hat will never hurt. Sunscreen is also generally a good idea. If the sun can hurt your eyes, it can also hurt your skin.

Remember that clouds are not an excuse to stare in the direction of the sun. Clouds do not block enough of the sun’s rays to mitigate harm.

References

The Sun, UV Radiation and Your Eyes. (August 24, 2014). American Academy of Ophthalmology.

UV and Sunglasses: How to Protect Your Eyes. (April 2019). All About Vision.

Ultraviolet Keratitis. (April 25, 2015). Cleveland Clinic.