Squint and lazy eye – 斜視或弱視

What is squint, strabismus and lazy eye?

A turned eye (squint or strabismus) means that an eye can turn in or out. It may be associated with the development of poor vision (a lazy eye).

What causes strabismus?

There is often a family history, or of thick glasses.

Why is this important?

It is important that this be recognised and treated early in life, as failure to do so may lead to permanent reduction in vision in the affected eye. It is also important that treatable medical conditions be looked for and treated as necessary.

How do we diagnose strabismus?

Assessment involves checking the vision: we have special ways of doing this, as it can be quite difficult with young children. Drops need to be instilled, and then some time is needed for these to work to enable proper examination. As a general rule, children are best examined in the morning when they are least tired. The eyes are then examined from a medical point of view to ensure that there is no disease. The child is also checked for a refractive error, as correcting this can encourage the vision to develop and prevent the development of a lazy eye.