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Related Experiment Video

Updated: May 2, 2026

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

Visual field examination using a video projector: comparison with Humphrey perimeter.

Dimitrios Brouzas¹, Stylianos Tsapakis¹, Eirini Nitoda¹

¹First Department of Ophthalmology, Medical School, University of Athens, Greece.

Clinical Ophthalmology (Auckland, N.Z.)

|March 21, 2014

Summary

A novel video projector visual field examination method shows high correlation with the Humphrey perimeter, a standard in automated perimetry. This technique may be suitable for clinical applications.

Keywords:

automated perimetry computerized perimetry video projector visual field software visual fields

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Area of Science:

Ophthalmology
Medical Technology

Background:

Automated perimetry is crucial for diagnosing visual field defects.
The Humphrey perimeter is the accepted standard for visual field testing.
Exploring alternative, potentially more accessible, methods for visual field examination is valuable.

Purpose of the Study:

To introduce a visual field examination method utilizing a video projector.
To compare the efficacy of this video projector method against the established Humphrey perimeter.

Main Methods:

Developed custom software for a full-threshold 4-2-step staircase algorithm.
Tested the system on 76 points within the central 30-2 visual field.
Utilized an Epson TW 700 video projector for visual field presentation.
Compared results with data from the Humphrey perimeter for nine eyes of seven patients.

Main Results:

A high correlation was observed between visual field results obtained via video projector and the Humphrey perimeter.
Point-to-point correlation coefficients ranged from 0.75 to 0.90.
Statistical significance was confirmed with P<0.0001 for each eye.

Conclusions:

Visual field examination using a video projector demonstrates a strong correlation with the Humphrey perimeter.
The developed video projector method shows potential for clinical utility in visual field testing.