Three in four parents are risking their child's eyesight by exposing them to bright sun without appropriate protection, experts warn.

专家警告道，四分之三的父母将自己的孩子的双眼直接曝与日光之下而没有任何保护。

Some children may resist wearing sunglasses

Nearly a third of parents in Britain do not buy their children sunglasses, a poll of 2,000 people for the College of Optometrists¹ revealed.

Of those who do, nearly half put price before protection and only a quarter buy sunglasses from a trusted brand.

The College recommends choosing dark glasses with a CE mark for quality.

People with light coloured eyes are most at risk from sun damage and those with blue eyes should always wear sunglasses, the experts advise.

UV rays from sunlight can damage the retina（视网膜） and the lens of the eye and can lead to long-term damage.

Too much exposure is linked to conditions like cataracts² and age-related macular degeneration（黄斑部变性）.

Wearing cheap sunglasses with no UV filters poses an even greater danger than wearing none at all because the pupils will dilate³（扩大，详述） allowing more harmful rays into the eye.

And the risk is cumulative⁴（累积的）, meaning the more UV exposure a person has the higher their risk will be.

Dr Susan Blakeney, optometric（视力检测，验光） adviser⁵ at the College of Optometrists, said: "I am shocked to see that so many parents aren't ensuring that their child's eyes are protected in the sun, and am equally astounded⁶（惊骇） to see that of those who do, many are opting⁷ for 'cheap and cheerful' over quality.

"Sunglasses don't need to be expensive to offer good protection but it is important for parents to check that the pair they buy carry a CE mark."

She said most children would happily wear sunglasses but said a sunhat to shade the eyes would also work, particularly for infants who may pull the glasses off.

However, research has shown mixed results about whether UV causes significant damage.

Consultant⁸ paediatric（儿科的） ophthalmologist（眼科医师） Michael Clarke said the issue was controversial.

The Royal College of Ophthalmologists recommends children wear protective sunglasses if they are likely to be exposed to a lot of UV light, such as during a day at the beach.

Very young children should not be exposed to bright sunshine at all, says the college.