In children who have a squint, both eyes appear to be looking in different directions. Squints affect 2%-3% of children and usually become obvious around 3-6 months of age.
A squint is usually due to an imbalance in the co-ordination of the muscles of the eye. Sometimes it can be caused by long-sightedness in one eye. Rare causes can include a cataract in one eye, or problems with the back of the eye (the retina).
Clinical features
In children with a squint, both eyes seem to be looking in different directions. Newborn babies may have a similar appearance, but this usually resolves after 3 months when they gain more muscle control. If your child still has a squint after this time, there is also a chance that he will develop a ‘lazy eye’ (amblyopia); the image coming from the deviated eye is suppressed by the brain to avoid confusion, and it ceases to function effectively. Vision is markedly reduced in the affected eye. In general, squints become more obvious when the child is tired or ill.
The treatment of squint is dependent on the cause. Thorough examination should first be performed, and your doctor will refer you to an eye specialist for this. Eye tests can determine if your child simply needs glasses. A lazy eye can be corrected by placing a patch over the good eye, forcing the lazy eye to function alone. If the problem is one of lack of co-ordination of eye muscles, then surgery may be required to shorten or lengthen one of the muscles. Children do not grow out of a squint.
When to see your doctor
Any child older than a few weeks of age and has a squint should be seen by an eye specialist for assessment. Remember it is never easy to assess vision.
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