Heterophoria
Heterophoria
Heterophoria (/ˌhɛtəroʊˈfɔːriə/; from Greek: ἕτερος, heteros, "different" + φορά, phorá, "bearing") is a condition of the eye where the two eyes have a tendency to deviate from their normal alignment when the fusion reflex is not stimulated. This is different from strabismus, where the misalignment is constant and visible to others.
Types of Heterophoria
There are three main types of heterophoria: esophoria, exophoria, and hyperphoria.
- Esophoria is a condition where the eyes have a tendency to turn inward.
- Exophoria is a condition where the eyes have a tendency to turn outward.
- Hyperphoria is a condition where one eye has a tendency to turn upward.
Causes
Heterophoria can be caused by a number of factors, including genetics, eye strain, and neurological disorders. It can also be a result of an injury to the eye muscles or nervous system.
Symptoms
Common symptoms of heterophoria include double vision, eye strain, headaches, and difficulty focusing on objects. These symptoms may be more noticeable when the person is tired or under stress.
Treatment
Treatment for heterophoria often involves vision therapy, which includes exercises designed to improve eye coordination and alignment. In some cases, corrective lenses or eye surgery may be recommended.
See Also
External links
- Medical encyclopedia article on Heterophoria
- Wikipedia's article - Heterophoria
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