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Journal of Biomedical Optics • Open Access

DLPTM-based dichoptic vision test system
Author(s): Russell L. Woods; Henry L. Apfelbaum; Eliezer Peli

Paper Abstract

It can be useful to present a different image to each of the two eyes while they cooperatively view the world. Such dichoptic presentation can occur in investigations of stereoscopic and binocular vision (e.g., strabismus, amblyopia) and vision rehabilitation in clinical and research settings. Various techniques have been used to construct dichoptic displays. The most common and most flexible modern technique uses liquid-crystal (LC) shutters. When used in combination with cathode ray tube (CRT) displays, there is often leakage of light from the image intended for one eye into the view of the other eye. Such interocular crosstalk is 14% even in our state of the art CRT-based dichoptic system. While such crosstalk may have minimal impact on stereo movie or video game experiences, it can defeat clinical and research investigations. We use micromirror digital light processing (DLPTM) technology to create a novel dichoptic visual display system with substantially lower interocular crosstalk (0.3%; remaining crosstalk comes from the LC shutters). The DLP system normally uses a color wheel to display color images. Our approach is to disable the color wheel, synchronize the display directly to the computer's sync signal, allocate each of the three (former) color presentations to one or both eyes, and open and close the LC shutters in synchrony with those color events.

Paper Details

Date Published: 1 January 2010
PDF: 13 pages
J. Biomed. Opt. 15(1) 016011 doi: 10.1117/1.3292015
Published in: Journal of Biomedical Optics Volume 15, Issue 1
Show Author Affiliations
Russell L. Woods, Schepens Eye Research Institute (United States)
Henry L. Apfelbaum, Schepens Eye Research Institute (United States)
Eliezer Peli, Schepens Eye Research Institute (United States)

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