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Retinal Defocus and Eye Dominance Effect on Eye-Hand Reaction Time

Author(s): Jennifer A. Gould, BS | Benjamin Arthur, BS | Naveen K. Yadav, MS

Journal: Optometry & Visual Performance
ISSN 2325-3479

Volume: 1;
Issue: 4;
Start page: 129;
Date: 2013;
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Keywords: blur | driving | eye dominance | eye-hand reaction time | gender | refraction | retinal defocus

Purpose: To study the effect of retinal defocus and sighting eye dominance on simple eye-hand reaction time in young visually-normal adults.Methods: Sixteen visually-normal individuals participated in a simple eye-hand reaction time test with different amounts of spherical and astigmatic retinal defocus introduced binocularly in the spectacle plane (plano to +10.00D sphere and +0.50 to +2.00D cyl). Reaction time was assessed under binocular-viewing conditions using the RT-2S Simple Reaction Time Tester. The test target color and size simulated a conventional traffic signal. In addition, sighting eye dominance testing was performed monocularly with different defocus amounts introduced before each eye on a subset of eight subjects. Results: There was no significant effect (p>0.05) of either spherical or astigmatic retinal defocus, or eye dominance, on simple eye-hand reaction time. However, gender differences revealed a consistent and significant effect of retinal defocus (p
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