For a variety of reasons, one or both eyes turn inward, outward, upward, or downward. The condition occurs in childhood, but is relatively rare.
Crossed eyes affects five percent of all children.
The earlier treatment is initiated, the easier it is to correct. A vision therapy program called orthoptics has been used by optometrists for decades to treat crossed eyes. There are different causes of crossed eyes, but the most common is poor eye muscle control. It is not that the muscles are weak. Actually, the muscles on the outside of the eyes are 100 times stronger than they need to be.