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The association between astigmatic anisometropia with visual acuity and stereopsis

Mohamad Basir, Nur Hanani and Ruslim, Nurul Hasmiza and Sopian, Syuhairah Nabilah and Ibrahim, Nura Syahiera and Ahmad, Norsham and Yusof, Firdaus and Md Mustafa, Md Muziman Syah (2020) The association between astigmatic anisometropia with visual acuity and stereopsis. International Journal of Allied Health Sciences, 4 (1). pp. 1092-1098. E-ISSN 2600-8491

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Aim: To study the association between astigmatic anisometropia with visual acuity (VA) and stereopsis. Methodology: Twenty emmetropic adults with normal binocularity in age of 18 to 34 years old, were recruited. Unilateral against-the-rule astigmatism anisometropia was induced in each participant by using -1DC, -2DC, -3DC and -4DC toric soft contact lenses. Distance VA is measured using logMAR chart, near VA is measured using Roman Test types chart, and stereopsis using TNO plates were assessed. Results: All participants showed a reduction in VA at distance and near, and stereopsis with the increasing values of astigmatic anisometropia by using correlation analysis. The correlation of induced astigmatic anisometropia with distance VA was a weak positive correlation, (r = 0.589, p = <0.05), and moderate positive correlation (r = 0.602, p = <0.05) with near VA. Stereopsis was similarly degraded and showed weak positive correlation (r = 0.589, p = <0.05). Both acuities showed significant reduction in each 1D increment of astigmatic anisometropia by 1 line, meanwhile stereopsis showed significant reduction by 2 lines. Stereopsis is affected the most. All parameters reduction can be predicted by using linear regression equation obtained, at any degree of astigmatic anisometropia. Conclusion: Increment in induced astigmatic anisometropia shown linear reduction in distance VA, near VA and stereopsis.

Item Type: Article (Journal)
Additional Information: 4954/79026
Uncontrolled Keywords: Astigmatic Anisometropia; Induced Anisometropia; Visual Acuity; Stereopsis
Subjects: R Medicine > RE Ophthalmology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Allied Health Sciences > Department of Optometry and Visual Science
Kulliyyah of Allied Health Sciences
Depositing User: Dr. Md Muziman Syah Md Mustafa
Date Deposited: 23 Feb 2020 02:38
Last Modified: 20 Apr 2022 12:38
URI: http://irep.iium.edu.my/id/eprint/79026

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