Strabismus is a condition in which the eyes are not aligned in the same direction. In your case, one of your eyes turns out while your other eye is used for seeing. In some cases, the eyes may alternate turning out. This condition is called exotropia. If the eyes are not aligned, the brain must ignore, or suppress, the information from one eye or double vision would result. In most cases, strabismus is caused by the faulty control of the external eye muscles that move the eyes. It may be caused by more serious factors such as trauma, diabetes, or brain lesions.
Treatment of this condition may vary depending on age, severity and cause. Treatment may include glasses, prism lenses, eye muscle exercises (vision therapy) or surgery.