The effect of induced blur monocularly and binocularly on stereoacuity

African Vision and Eye Health

Field Value
Title The effect of induced blur monocularly and binocularly on stereoacuity
Creator Metsing, Thokozile I.
Subject Optometry; ophthalmology; vision science stereoacuity; isometropia; anisometropia; depth perception; induced blur; retinal disparity; optical blur.
Description Background: Stereopsis plays a significant role in our visual system because it allows perception of depth to perform day-to-day activities.Aim: The aim of this study was to determine the severity and proportions of monocular versus binocular-induced blur on stereoacuity using the Randot® Stereo Test (RST) at near (40 cm).Setting: Data were collected at the optometry clinic of the University of Johannesburg.Methods: The study used a cross-sectional, experimental and prospective design with a quantitative approach. Forty university students between the ages of 18 years and 25 years were invited to participate in this study. Blur was induced monocularly and binocularly through 1 dioptre (D) to 3 D lenses and stereoacuity was measured using the RST at near (40 cm).Results: Stereoacuity measured with the added 1 D to 3 D lenses monocularly and binocularly resulted in reduced stereopsis, which was worse monocularly, found not to be significant (p = 0.17) with the addition of the 1 D lens(es) monocularly and binocularly. Significant reductions in stereoacuity were found with the addition of 2 D (p = 0.00) and 3 D (p = 0.00) monocularly and binocularly, respectively.Conclusion: The effect of induced optical blur monocularly on stereoacuity impacted significantly compared with induced binocular blur. However, the different accommodative amplitudes could have affected monocularly and binocularly induced stereoacuity for some participants.Contribution: The study is clinical and focuses on the effect of induced blur monocularly and binocularly on stereoacuity. Key insights are that the effect of induced optical blur monocularly impacted significantly on stereoacuity compared with induced blur binocularly.
Publisher AOSIS
Date 2023-10-23
Type info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion — Randomised control trial
Format text/html application/epub+zip text/xml application/pdf
Identifier 10.4102/aveh.v82i1.846
Source African Vision and Eye Health; Vol 82, No 1 (2023); 6 pages 2410-1516 2413-3183
Language eng
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Coverage South Africa 1984-2021 Refractive errors, stereoacuities, age
Rights Copyright (c) 2023 Thokozile I. Metsing