Ensure they absorb UV rays
UV rays can damage your eyes and eventually impair your sight. So make sure sunglasses have the correct level of UVA/UVB protection by looking for the CE, UV 400 or British Standard Mark. Sun damage can lead to cataracts and also speed up ageing of
a part of the retina called the macula, which is a major cause of sight loss.
Buy a pair that fits well
The size and shape are important because if they don’t fit snugly and cover your eyes, light could enter your eye from around the lenses.
Don’t go for dark
Some people believe very dark lenses offer more protection, but darkness is not a gauge of effectiveness. Also darker glasses can impair vision, especially while driving. According to experts at Boots, lenses that are yellow-orange or rose-coloured are best at cutting out glare and for optimum visibility.
Beware of fakes
They may look convincing and cost a fraction of the price of the real thing,
but many replica designer sunglasses have no UV protection, leaving your
eyes vulnerable to sun damage.
Don’t forget the kids
Children’s eyes are even more susceptible to UV damage, so it’s important to ensure their sunglasses have the right level of UVA/UVB protection. Avoid toy sunglasses —
they have little UV protection and can cause more damage as they cause
the pupils to dilate.