Long-term exposure to the sun without proper protection can increase the risk of eye diseases, such as cataracts. Also, the possibility of dangerous skin lesions on the eyelids as well as their premature aging increases (since the skin is sensitive and thinner in this area). Finally, solar radiation can lead to the appearance of a pterygium and other forms of the conjunctiva, age-related macular degeneration and photokeratitis. Heading into summer, Emmetropia shares nine essential tips for buying the best sunglasses to protect your eyes.