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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Related Experiment Video

Updated: Nov 27, 2025

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
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Acquired nystagmus.

Jesse Panthagani1,2, Jasvir Virdee1,3, Trystan MacDonald1

  • 1Birmingham and Midland Eye Centre, Birmingham, UK.

British Journal of Hospital Medicine (London, England : 2005)
|December 2, 2020
PubMed
Summary
This summary is machine-generated.

Acquired nystagmus involves involuntary repetitive eye movements developing after infancy. This review covers its types, causes, and treatments, highlighting potential underlying pathologies.

Keywords:
Acquired nystagmusConjugate nystagmusHorizontal nystagmusNystagmusOscillopsiaRotational nystagmusVertical nystagmus

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Area of Science:

  • Ophthalmology
  • Neurology

Background:

  • Nystagmus is characterized by repetitive, involuntary eye movements.
  • These movements can be horizontal, vertical, or torsional, with varying speeds (jerk or pendular).
  • Normal gaze relies on visual fixation, the vestibulo-ocular reflex, and gaze-holding systems.

Purpose of the Study:

  • To review the terminology, pathophysiology, causes, and treatment of acquired nystagmus.
  • To emphasize the importance of investigating underlying pathologies associated with acquired nystagmus.

Main Methods:

  • Literature review of acquired nystagmus.
  • Analysis of nystagmus terminology and classification.
  • Discussion of etiological factors and therapeutic interventions.

Main Results:

  • Acquired nystagmus is defined as nystagmus developing after early infancy.
  • It can manifest as jerk or pendular movements.
  • Associated symptoms may include oscillopsia, indicating potential serious underlying conditions.

Conclusions:

  • Acquired nystagmus necessitates thorough investigation due to potential underlying pathologies.
  • Understanding the pathophysiology and classification is crucial for appropriate management.
  • This review provides a comprehensive overview for clinicians and researchers.