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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

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...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...

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Related Experiment Video

Updated: May 19, 2026

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
07:26

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking

Published on: September 26, 2019

Eye movements during visual search in patients with glaucoma.

Nicholas D Smith1, Fiona C Glen, David P Crabb

  • 1Department of Optometry and Visual Science, City University London, London, UK.

BMC Ophthalmology
|September 4, 2012
PubMed
Summary

People with glaucoma make fewer saccades (eye movements) during visual search tasks compared to those with normal vision. Saccade rate is linked to visual function and search performance in glaucoma patients.

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Published on: September 18, 2012

Related Experiment Videos

Last Updated: May 19, 2026

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking

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Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
11:12

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

Published on: September 18, 2012

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Human Physiology

Background:

  • Glaucoma significantly impacts daily activities, particularly visual search.
  • Understanding visual search deficits in glaucoma is crucial for patient care.

Purpose of the Study:

  • To compare saccadic eye movements in glaucoma patients versus normal vision controls during visual search.
  • To investigate the relationship between eye movement patterns and visual search impairment in glaucoma.

Main Methods:

  • Forty glaucoma patients and 40 age-matched controls performed a visual search task.
  • Eye movements were tracked using an eye tracker to record saccade rate and amplitude.
  • Response variables were correlated with visual field (VF) defects and contrast sensitivity.

Main Results:

  • Glaucoma patients exhibited a significantly lower average saccade rate (5.6% reduction) compared to controls.
  • No significant difference in average saccade amplitude was observed between groups.
  • Lower saccade rates correlated with poorer contrast sensitivity and more severe VF defects in glaucoma patients.

Conclusions:

  • Glaucoma patients demonstrate a reduced rate of saccades during visual search.
  • Saccade rate variability exists, but higher rates correlate with improved search performance.
  • Assessing eye movements may offer insights into functional deficits caused by glaucoma.