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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

668
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...
668
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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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...
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Related Experiment Video

Updated: Aug 8, 2025

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
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A Novel Visual Field Screening Program for Glaucoma With a Head-Mounted Perimeter.

Kota Arai1,2, Euido Nishijima1, Shumpei Ogawa1

  • 1Department of Ophthalmology, The Jikei University School of Medicine, Nishishimbashi.

Journal of Glaucoma
|February 27, 2023
PubMed
Summary

A new head-mounted perimeter, the imo, offers accurate and rapid glaucoma screening. This visual field test effectively detects glaucoma across all stages, aiding early diagnosis and management.

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Area of Science:

  • Ophthalmology
  • Medical Devices
  • Diagnostic Technology

Background:

  • Glaucoma is a leading cause of irreversible blindness worldwide.
  • Early detection of glaucoma is crucial for preventing vision loss.
  • Current visual field testing methods can be time-consuming and require specialized equipment.

Purpose of the Study:

  • To evaluate the accuracy and efficiency of a novel head-mounted perimeter, the imo, for visual field screening in glaucoma detection.
  • To assess the performance of the imo system in identifying glaucoma across different disease stages.

Main Methods:

  • A comparative study involving 76 non-glaucoma participants and 92 glaucoma patients.
  • Visual field testing was performed using both the Humphrey Visual Field Analyzer and the imo head-mounted perimeter.
  • Key performance indicators including sensitivity, specificity, predictive values, and testing time were analyzed.

Main Results:

  • The imo visual field screening program demonstrated high sensitivity (76%-100%) and specificity (91%-100%).
  • Testing times were significantly short, averaging 46 seconds for normal controls and increasing with disease severity.
  • Areas under the receiver operating characteristic curves indicated excellent differentiation between glaucoma patients and controls, especially in moderate and advanced stages (0.97 and 1.0, respectively).

Conclusions:

  • The head-mounted perimeter imo provides a rapid and accurate method for visual field screening in glaucoma detection.
  • The imo system is effective in identifying glaucoma across all stages, supporting its potential use in clinical settings.
  • This novel device shows promise for improving early glaucoma diagnosis and patient management.