Strabismus
Strabismus is the visual axis deviation in an eye that causes cross-eye vision. There are several types of strabismus. If the eyes are crossed or the eye deviates inward, it is called convergent strabismus or esotropia. If the eye deviates outward, it is called divergent strabismus or exotropia. In some cases, the visual axis of one eye is higher than the other eye. The higher eye is diagnosed with hypertropia, while the lower eye is diagnosed with hypotropia. The condition may be intermittent, constant, or may alternate between the eyes. Strabismus cases vary from mild to severe depending on the deviation between the eyes.
Strabismus affects adults and children in different ways. Symptoms of strabismus in children are usually mild. Parents see their children as they tilt their heads to one side to compensate, or they close or cover the affected eye. Symptoms of strabismus in adults may be more severe. Adult patients with this condition lose their binocular vision, which can cause double vision and loss of depth perception. As a result, patients may suffer from headaches or eye fatigue.
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