Sun Wear for Children - Studies support it and experts agree - kids have the greatest need for protection from the sun. Because their crystalline lenses have not yet matured, the eyes of children under the age 10 are much more vulnerable to UV damage.Kids have big pupils and particularly clear lens inside the eye that allows a whole bunch of UV light in. Without sun protection, damage can contribute to the risk of cataracts and macular degeneration. Think of it another way many parents take their children to the beach and apply them with sunscreen, but they are not wearing sunglasses, Sunglasses with UV protection is sunscreen for the eyes.