Do kids need to wear sunglasses to protect their eyes?

What the evidence says

Yes, kids should wear sunglasses outside, and it matters more for them than for adults. The Canadian Paediatric Society says a child's sun protection kit should include a wide-brimmed hat, loose cotton clothing, and sunglasses with 100% UV protection, alongside sunscreen.

There's a good reason kids need this more than grown-ups do. The clear part of a child's eye, called the lens, hasn't yet developed the yellow color that adult lenses have. That yellow color blocks UV light from reaching the retina, the light-sensing part at the back of the eye. Because kids don't have much of this natural filter yet, more UV light can pass all the way through to their retina.

UV light can hurt eyes in two ways. Short-term, too much sun can cause a painful surface burn on the eye, a bit like a sunburn, sometimes called snow blindness when it happens from sun reflecting off snow. Long-term, UV exposure builds up over a lifetime and raises the risk of cataracts, a clouding of the eye's lens, later in life. Since a large share of a person's total lifetime sun exposure happens before age 18, protecting eyes early matters.

Health Canada explains that not all sunglasses are equal. Look for a label saying they block UVA and UVB rays, choose ones that fit closely or wrap around so light can't sneak in from the sides, and pick lenses dark enough to be comfortable without blocking so much light that vision is affected. Price and lens darkness alone don't tell you how much UV protection a pair actually gives.

Don't worry if a toddler refuses to keep sunglasses on. In that case, a wide-brimmed hat and staying in shade during peak sun hours, especially late morning to mid-afternoon, are good backup ways to protect their eyes.