Sunglasses should be dark enough to reduce glare, but not dark enough to distort colors and affect the recognition of traffic signals. Tint is mainly a matter of personal preference. For best colour perception, buy lenses that are neutral gray, amber, brown or green.

People who wear contact lenses that offer UV protection should still wear sunglasses. Children should also wear sunglasses. They shouldn’t be toy sunglasses, but real sunglasses that indicate the UV-protection level just as with adults.

Polycarbonate lenses are generally recommended for children because they are the most shatter-resistant. Even when we talk about 100 percent UV protection, light still enters from the sides of sunglasses and can be reflected into the eye, which is why people choose sunglasses that wrap all the way around the temples.

Don’t assume that you get more UV protection with pricier sunglasses or glasses with a darker tint. Look for a label that specifically states that the glasses offer 99 per cent to 100 per cent UV protection