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Neuro-Orthoptics

Acquired nystagmus

Abstract

Acquired nystagmus is a condition where involuntary, rhythmic eye movements develop after birth. Unlike congenital nystagmus, which is present from birth, acquired nystagmus is often a symptom of an underlying medical condition.

Common Causes of Acquired Nystagmus

  • Neurological disorders: Conditions such as stroke, multiple sclerosis, brain tumors, and Parkinson's disease can damage the parts of the brain responsible for eye movement control.

  • Ear disorders: Inner ear problems, like vestibular neuritis or Meniere's disease, can disrupt the balance system and lead to nystagmus.

  • Eye diseases: Conditions like cataracts, glaucoma, or retinal detachment can affect the visual system and trigger nystagmus.

  • Medications: Certain medications can cause nystagmus as a side effect.

  • Head injury: Trauma to the head can damage the brain and nerves involved in eye movement.

Anatomical Considerations

Acquired nystagmus can arise from damage to various components of the oculomotor system:

  • Brainstem: The brainstem, which houses the nuclei for the cranial nerves controlling eye movement, can be affected by conditions like stroke or tumors.

  • Cerebellum: The cerebellum, responsible for coordinating movements, can be damaged by disorders like multiple sclerosis or stroke.

  • Inner ear: The vestibular system in the inner ear helps maintain balance and contributes to eye movement control. Damage to this system can lead to nystagmus.

  • Extraocular muscles: Conditions like Graves' disease can cause inflammation of the extraocular muscles, leading to nystagmus.

Types of Acquired Nystagmus:

  • Horizontal nystagmus: The most common type, where the eyes move horizontally back and forth.

  • Vertical nystagmus: The eyes move up and down.

  • Rotational nystagmus: The eyes move in a circular or torsional pattern.

Treatment: The treatment for acquired nystagmus depends on the underlying cause. It may involve medications, surgery, or rehabilitation therapy to address the underlying condition and improve eye movement control.



Note : This document serves educational purposes exclusively and does not constitute medical advice or treatment guidelines

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