Condition in which a person can not align both eyes simultaneously. One eye may turn in, out, up or down. When the eye turns in, it is called - esotropia, when it turns out, it is called - exotropia, when the eye turns down, it is called hypotropia & when the eye goes up, it is called - hypertropia.

Causes

Weakened muscles or abnormal nerve impulses to the eye muscles.
Heredity.
Blurred or poor vision, due to any cause, such as cataracts, refractive errors etc

What will happen if my child has squint?

Squint can lead to 'lazy eye' or amblyopia, in which the vision in the squinting eye decreases. Amblyopia is better treated at an younger age. So it is better to consult your eye doctor as soon as you notice any abnormality of the eyes.
There can be faulty depth perception.
Improper psychological & personality development due to low self esteem.

Treatment

It is a wrong notion that the child will outgrow the squint.

When the squint is associated with refractive error, the squint may get corrected on wearing glasses.

If not corrected with glasses it will have to be corrected by surgery.

Surgery is done under general anaesthesia in children & local anaesthesia in cooperating adults.

Your doctor may operate on one or 2 eyes simultaneously.

Strabismus surgery results in variable outcomes that still are not controlled completely, even by the best surgeon. Hence some cases may need resurgeries.

Eye is bandaged for one day after surgery.

Eye drops will have to be instilled, for 4 to 6 weeks after surgery.

1st Follow up will be after a week.

There is no necessity to restrain the normal activity of the child.