Effect of Correction Lens for Anisometropia on Aniseikonia and Binocular Function.

Lee, MarVin; Yang, Hong Seok; Lew, Ho Min; Lee, Jong Bok; Chang, Yoon Hee

Original Article

Journal of the Korean Ophthalmological Society 2005;46(7):1183-1188.
Published online July 31, 2005.

Effect of Correction Lens for Anisometropia on Aniseikonia and Binocular Function.

MarVin Lee, Hong Seok Yang, Ho Min Lew, Jong Bok Lee, Yoon Hee Chang

¹Department of Ophthalmology, Ajou University School of Medicine, Suwon, Korea. yhchang@ajou.ac.kr
²Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.

부등시 교정렌즈가 부등상시 및 양안시 기능에 미치는 영향

이마빈¹,양홍석¹,유호민¹,이종복²,장윤희¹

Department of Ophthalmology, Ajou University School of Medicine¹, Suwon, Korea Department of Ophthalmology, Yonsei University College of Medicine², Seoul, Korea

Correspondence: MarVin Lee, M.D.¹

Abstract

PURPOSE
To study the effect of the corrective lens for anisometropia on aniseikonia and binocular function. METHODS: The study subjects were 30 patients without strabismus and amblyopia, who had anisometropia of more than 1.00D between the spherical equivalent of each correction lens. The amount of aniseikonia was measured by Awaya's New Aniseikonia Test. The degree of stereopsis and fusion were determined with Titmus Stereo Test and fusion card of major amblyoscope, respectively. RESULTS: The amount of aniseikonia increased significantly with increasing level of anisometropia (p=0.000). There was a statistically significant correlation between the amount of anisometropia and fusion (p=0.046). With increased aniseikonia, the stereopsis declined consequently, but the decline was not statistically significant. Aniseikonia was induced when there was more than 2.00D of anisometropia. With anisometropia increased by 1.00D, the odds ratio of induced aniseikonia was 7.197 (p=0.047). CONCLUSIONS: Anisometropia is an important factor for aniseikonia and can disturb binocular function.

Key Words: Aniseikonia;Anisometropia;Fusion;Stereopsis