The 401 on Strabismus
The two most common types of strabismus include accommodative esotropia and intermittent exotropia. The former occurs with farsightedness due to extra focusing that causes the eyes to turn inward, and the latter is an inability to coordinate both eyes together
Strabismus is an eye condition that causes the eyes to misalign and cross or wander. The eyes appear not to be looking at the same place at the same time.
The condition may present itself constantly or only during certain times, such as when the person is tired, ill, or doing tasks such as reading. It may always affect the same eye, both, or alternate. It is thought to be related to a high level of farsightedness.
There are six muscles that attach to and control each eye. They receive signals from the brain that direct the eye's movements. A person with poor eye-muscle control may develop strabismus. If this happens, the brain gets two different images and, over time, will learn to ignore the weaker eye. If left untreated, strabismus can lead to a permanent reduction in vision known as amblyopia, or lazy eye.
Some infants' eyes appear to be misaligned but are actually normal and just have skin covering the inner eye's corner; this may also appear in children with wide bridges of the nose. This is not serious and is called pseudostrabismus, or false strabismus. If a child is older than four months old and their eyes still are not straight, then it's time to see a doctor.