Children’s eyes are especially vulnerable. According to the World Health Organization, UV damage to the eyes is cumulative, meaning it builds over time. Since up to 80% of a person’s lifetime exposure to UV is received before the age of 18, the damage to young eyes in childhood can lead to serious problems like cataracts and macular degeneration later in life.
 
Only purchase sunglasses that block out at least 99% of both UV-A and UV-B radiation. Make sure the sunglasses fit the child’s face and shield the eyes from all angles. Choose lenses that are impact resistant and made of polycarbonate, never glass, unless prescribed by a doctor. Make sure lenses are not scratched or damaged.

Purchase wraparound sunglasses to protect eyes as well as the delicate skin around the eyes. Add a wide-brimmed hat or cap for even better protection.
 
No matter how cute or how much the sunglasses may appear to shade the eyes, those without UV protection will actually cause the pupils to dilate, which allows in even more harmful rays, so shop wisely and not just for price or fashion.