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Related Experiment Video

Updated: Jul 27, 2025

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

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

Published on: July 21, 2020

Using high-density perimetry to explore new approaches for characterizing visual field defects.

I Marín-Franch¹, H J Wyatt², W H Swanson³

¹Computational Optometry, Atarfe, Granada, Spain; Southwest Eye Institute, Tavistock, UK.

Vision Research

|June 7, 2023

Summary

This summary is machine-generated.

High-density perimetry can miss defects and is slow. A new "slice display" method for visual field testing may significantly reduce test time while accurately locating vision defects near blood vessels.

Keywords:

Angioscotomas Eye tracking Information Graphics Micro-perimetry Visual Function

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Area of Science:

Ophthalmology
Visual Neuroscience
Medical Imaging

Background:

Conventional static threshold perimetry may miss visual field defects due to undersampling.
High-density testing, while more thorough, is often time-consuming and affected by normal eye movements.

Purpose of the Study:

To explore alternatives to conventional and high-density perimetry for detecting angioscotomas.
To investigate if a novel

Main Methods:

Developed and tested a "slice display" method using a Digital Light Ophthalmoscope in four healthy adults.
Measured contrast thresholds at 247 locations on a 13°×19° grid to identify areas of reduced sensitivity near retinal blood vessels.
Analyzed structure-function agreement, accounting for eye position, and compared results with the slice display method.

Main Results:

Diffuse regions of reduced sensitivity were found near blood vessels, with moderate structure-function agreement.
The slice display method showed that fewer trials could achieve similar structure-function agreement compared to traditional mapping.
This suggests that focusing on defect location rather than full sensitivity maps can improve efficiency.

Conclusions:

The slice display method offers a promising alternative for visual field testing, potentially reducing test duration significantly.
This approach may allow for accurate mapping of defect shapes without the extensive time commitment of high-density threshold perimetry.
Further simulations indicate the potential for developing efficient algorithms for defect detection.