It's a good idea, because exposure to ultraviolet rays may raise his risk for cataracts and other eye problems later in life. But if your child resists, don't push it. A visor or a hat that keeps the sun out of his eyes might be a more workable choice than shades for babies, toddlers, and even some older kids.If your child is open to wearing sunglasses, let him help pick them out so he'll be more likely to wear them. And make sure you wear sunglasses, too, because he's probably eager to copy you.Not just any sunglasses will do, though. Putting low-quality sunglasses on your child is worse than his wearing no glasses at all. That's because poor-quality sunglasses can cause your child's pupils to dilate-therefore letting more UVA and UVB rays in-without offering protection.