The American Academy of Ophthalmology offers seven tips for choosing sunglasses that protect against the sun's damaging UV rays.

Sunglasses aren't an optional summertime accessory, they're an essential prescription for eye health. Long-term exposure to the sun without proper protection can increase the risk of eye disease, including cataract, growths on the eye, and eye cancer. As summer gets underway, The American Academy of Ophthalmology shares seven essential tips for buying the best sunglasses to protect your eyes.

• Choose sunglasses that block 99% to 100% of both UVA and UVB radiation. Labels can sometimes be confusing. Some indicate sunglasses offer 100% protection from UVA/UVB radiation, others offer 100% UV 400 protection. Rest assured, both will block 100% of the sun's harmful radiation.

• Doubt the UV protection label? Take your sunglasses to an optical shop or an ophthalmologist’s office. Most have a UV light meter that can test the UV-blocking ability of sunglasses.

• Buy oversized. The more coverage from sunglasses, the less sun damage inflicted on the eyes. Consider buying oversized glasses or wraparound-style glasses, which help cut down on UV entering the eye from the side.

• Don't be fooled by color. While dark lenses may look cool, they do not block more UV rays.

• You don't need to pass on cheap sunglasses. Sunglasses don't have to cost a lot of money to provide adequate eye protection. Less expensive pairs marked as 100% UV-blocking can be just as effective as pricier options.

• Don't forget the kids. Children are just as susceptible to the sun's harmful rays as adults. Start them on healthy habits early.

• Consider polarized lenses. Polarization reduces glare coming off reflective surfaces like water or pavement. This does not offer more protection from the sun but can make activities like driving or being on the water safer or more enjoyable.

Even short-term exposure can damage the eyes. Sun reflecting off water can cause a painful sunburn called photokeratitis on the front part of the eye. It causes redness, blurry vision, sensitivity to bright light, and, in rare cases, even temporary vision loss.

"Think of sunglasses as sunscreen for your eyes," said Dianna Seldomridge, MD, clinical spokesperson for the American Academy of Ophthalmology. "Your eyes need protection from the sun's damaging ultraviolet rays just like your skin. Make sure your eyes are protected year-round. Harmful UV rays are present even on cloudy days."

About the American Academy of Ophthalmology

The American Academy of Ophthalmology is the world’s largest association of eye physicians and surgeons. A global community of 32,000 medical doctors, we protect sight and empower lives by setting the standards for ophthalmic education and advocating for our patients and the public. We innovate to advance our profession and to ensure the delivery of the highest-quality eye care. Our EyeSmart^® program provides the public with the most trusted information about eye health. For more information, visit aao.org.