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Glaucoma: Overview

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Related Experiment Video

Updated: May 11, 2026

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
07:45

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

Published on: July 21, 2020

Binocular vision in glaucoma.

J A Reche-Sainz1, R Gómez de Liaño, N Toledano-Fernández

  • 1Servicio de Oftalmología, Hospital Universitario de Fuenlabrada, Fuenlabrada, Madrid, Spain. jalbres@yahoo.es

Archivos De La Sociedad Espanola De Oftalmologia
|April 30, 2013
PubMed
Summary
This summary is machine-generated.

Primary open-angle glaucoma (POAG) patients often experience impaired binocular vision, including increased exophoria and reduced stereoacuity. These binocular vision deficits, particularly in near vision, are linked to POAG but not early hypertensive stages.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Vision Science

Background:

  • Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness.
  • Binocular vision plays a crucial role in visual perception and daily activities.
  • Understanding binocular vision impairments in POAG is essential for early detection and management.

Purpose of the Study:

  • To investigate and describe the specific impairments in binocular vision among patients diagnosed with primary open-angle glaucoma (POAG).
  • To compare the binocular vision status of POAG patients with ocular hypertensives and normal subjects.

Main Methods:

  • A cross-sectional study involving 58 POAG patients, 76 ocular hypertensives, and 82 normal controls.
  • Utilized a comprehensive battery of binocular vision tests, including phoria angle measurement, amplitudes of fusion (AF), near point of convergence (NPC) assessment, Worth test for suppression, and stereoacuity tests (Titmus and TNO).

Main Results:

  • POAG patients exhibited significantly increased phoria angles and reduced amplitudes of fusion (AF), especially in near vision (P=.000).
  • Near point of convergence (NPC) was significantly higher in POAG patients (P=.000), and stereoacuity was reduced in both tested conditions (P=.001).
  • While near-distance suppression showed no differences, distance vision suppression was significantly higher in POAG patients compared to hypertensives (OR=3.867) and controls (OR=5.831).

Conclusions:

  • Primary open-angle glaucoma (POAG) is strongly associated with specific binocular vision deficits: increased near exophoria, reduced near AF, increased NPC for distance, central suppression in far vision, and diminished stereoacuity.
  • These observed binocular vision impairments in POAG do not appear to be early indicators, as they were not present in the ocular hypertensive group compared to controls.