Harmful ultraviolet rays can cause damage to the eye, including cataracts and damage to the retina. Experts emphasize that protection from these rays is crucial when buying sunglasses. The darkness of lenses does not guarantee protection.

Further information is available on how to check for UV protection in sunglasses. Experts at an optometry school note that a clear coat provides UV light protection, not the tint on the glasses.

Details on the importance of UV protection and its effects on the eye are provided by experts in the field, including a dean and professor at an optometry school.