THE ASSOCIATION BETWEEN ASTIGMATIC ANISOMETROPIA WITH VISUAL ACUITY AND STEREOPSIS

Authors

  • NUR HANANI MOHAMAD BASIR
  • NURUL HASMIZA RUSLIM
  • SYUHAIRAH NABILAH SOPIAN
  • NURA SYAHIERA IBRAHIM
  • NORSHAM AHMAD
  • FIRDAUS YUSOF @ ALIAS
  • MD MUZIMAN SYAH MD MUSTAFA

Abstract

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.

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Published

2020-02-25

How to Cite

MOHAMAD BASIR, N. H. ., RUSLIM, N. H. ., SOPIAN, S. N. ., IBRAHIM, N. S. ., AHMAD, N. ., YUSOF @ ALIAS, F. ., & MD MUSTAFA, M. M. S. . (2020). THE ASSOCIATION BETWEEN ASTIGMATIC ANISOMETROPIA WITH VISUAL ACUITY AND STEREOPSIS . INTERNATIONAL JOURNAL OF ALLIED HEALTH SCIENCES, 4(1), 1092–1098. Retrieved from https://journals.iium.edu.my/ijahs/index.php/IJAHS/article/view/425

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