Duane anomaly
Duane Anomaly
Duane anomaly, also known as Duane syndrome or Duane retraction syndrome (DRS), is a rare, non-progressive strabismus disorder characterized by abnormal eye movement. The term is pronounced as /dʊˈeɪn əˈnɑːməli/.
Etymology
The condition is named after American ophthalmologist, Alexander Duane, who first described the syndrome in detail in 1905.
Definition
Duane anomaly is a congenital eye movement disorder where there is a miswiring of the eye muscles. This results in limited outward movement of the eye (abduction) and/or limited inward movement of the eye (adduction). In some cases, the eyeball may retract, or pull in, towards the back of the eye socket when the patient attempts to move the eye inward or outward.
Symptoms
Symptoms of Duane anomaly may include strabismus, amblyopia, astigmatism, and nystagmus. The severity of these symptoms can vary widely among individuals.
Causes
Duane anomaly is caused by a developmental problem of the sixth cranial nerve, also known as the abducens nerve, which controls the lateral rectus muscle responsible for outward eye movement. The exact cause of this developmental problem is not known, but it is believed to occur during the early stages of pregnancy.
Treatment
Treatment for Duane anomaly is usually not necessary unless the condition is causing significant problems. In some cases, eye patching, vision therapy, or surgery may be recommended.
Related Terms
- Strabismus
- Amblyopia
- Astigmatism
- Nystagmus
- Sixth cranial nerve
- Abducens nerve
- Eye patching
- Vision therapy
- Surgery
External links
- Medical encyclopedia article on Duane anomaly
- Wikipedia's article - Duane anomaly
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