Parents can follow some simple advice from the government about looking after their child"s vision.
Babies have their eyesight assessed within a few weeks of birth and children starting school at around four years of age undergo another test, the government advice notes.
Children under 16, and full-time students under the age of 19, are entitled to free eye tests on the NHS.
If this exam reveals they need some correction, parents will be issued with a voucher towards the cost of glasses.
Children can also wear contact lenses and an optician will be able to advise on this.
They must, however, be old enough to put the lenses in and take them out themselves and understand the need to look after them properly - including practicing good hygiene like washing their hands before they handle the lenses.
by Martin Burns