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Related Concept Videos

Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Related Experiment Video

Updated: May 8, 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

The relationship between better-eye and integrated visual field mean deviation and visual disability.

Karun S Arora1, Michael V Boland1, David S Friedman2

  • 1Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland.

Ophthalmology
|September 3, 2013
PubMed
Summary

Better-eye visual field (VF) mean deviation (MD) and integrated VF (IVF) MD rarely differ significantly. Both measures similarly associate with visual disability, making better-eye MD a practical choice for clinical reporting.

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Area of Science:

  • Ophthalmology
  • Visual Science

Background:

  • Glaucoma diagnosis and monitoring rely on visual field (VF) testing.
  • Mean deviation (MD) quantifies overall VF loss, with better-eye MD and integrated VF (IVF) MD being common metrics.

Purpose of the Study:

  • To compare better-eye MD and IVF MD in glaucoma patients.
  • To assess the relationship of these MD measures with functional abilities and performance.

Main Methods:

  • Retrospective analysis of 490 Salisbury Eye Evaluation (SEE) subjects and 7053 glaucoma clinic patients with VF loss.
  • Calculated differences between better-eye and IVF MD and modeled their associations with driving, mobility, self-reported function, and reading speed.

Main Results:

  • Median differences between better-eye and IVF MD were small (0.41 dB for SEE, 0.72 dB for clinic).
  • Large differences (≥2 dB) occurred in 9% (SEE) and 18% (clinic) of subjects.
  • Both MD measures showed similar associations with ability/performance metrics.

Conclusions:

  • Better-eye MD and IVF MD rarely differ substantially.
  • Both MD metrics demonstrate comparable relationships with visual disability.
  • Better-eye MD is a practical and robust measure for reporting VF loss severity in clinical settings.