Children's behavioural issues may mask underlying vision problems, experts warn

Eye specialists highlight how undiagnosed visual issues like convergence insufficiency can be mistaken for behavioural problems in children, emphasising the importance of regular eye tests for early detection.

As children settle back into classrooms, some parents may be hearing less about grades than about behaviour. Fidgeting, rushing through work, losing concentration and avoiding reading can all look like simple poor attention, but eye specialists say those signs can sometimes point to an undiagnosed vision problem.

Chien Wong, a consultant ophthalmologist at OCL Vision, told the Examiner that children often do not realise their eyesight is a problem because they have no reference point for anything else. He said a child may not think to ask for glasses if the board is blurry or the words on a page feel hard to keep in place; instead, they may switch off, become restless or appear to be misbehaving.

Wong said the issue is not always about blurred sight in each eye on its own. According to the National Eye Institute, a condition called convergence insufficiency can make it hard for the eyes to work together when looking at nearby objects, which can lead to headaches, blurred or double vision and difficulty concentrating. NHS patient guidance says the same condition can make reading and other close-up tasks tiring, particularly when a child is fatigued.

The knock-on effect can be mistaken for attitude or laziness. Children who find reading uncomfortable may skim too quickly and make careless mistakes, or avoid writing altogether. Others may bump into objects, struggle in PE or complain of headaches after school. The CDC says regular eye checks can help identify vision problems early, because uncorrected issues can affect learning and daily activities, while the NHS says children in the UK are entitled to free eye tests up to the age of 16, or 19 if they remain in full-time education.