Strabismus

In strabismus the eyes of the child are not aligned and look at different directions.

Usually one eye is the dominant eye and is looking at the direction of vision whereas the other eye converges (to the nose) or diverges (out). In some occasions the eyes alternate directions.
Strabismus can be present early, just after birth (congenital strabismus) or at a later age.
The most common strabismus is idiopathic (with no particular cause)
Often strabismus can coexist with refractive errors and correcting those can fully or partially improve the angle of strabismus.

Finally and very importantly some brain disorders can cause or coexist with strabismus and it is really crucial for the paediatric ophthalmologist to decide whether further neurological tests are necessary in a child with strabismus.