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Clinical Study of Changes in Eye Dominance after Pseudophakic Conventional Monovision
백내장수술 시 시행한 고전 단안시 요법 후 우세안 변화에 대한 임상 연구
JKOS 2019 Jun;60(6):534-40
Published online June 15, 2019;
Copyright © 2019 The Korean Ophthalmological Society.
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Minsub Lee, MD, Ki Cheul Shin, MD, PhD

Department of Ophthalmology, Konkuk University School of Medicine, Seoul, Korea
건국대학교 의과대학 안과학교실
Received November 8, 2018; Revised January 31, 2019; Accepted May 17, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Purpose: The purpose of this study was to evaluate whether eye dominance changes after conventional pseudophakic monovision, and to identify factors that affect changes in eye dominance.
Methods: This retrospective study included 70 patients who underwent bilateral conventional monovision cataract surgery. Patients were divided into two groups based on whether they experienced a change in the dominant eye. We compared patients’ uncorrected distance visual acuity (UCDVA), uncorrected near visual acuity (UCNVA), best-corrected visual acuity (BCVA), spherical equivalent, stereopsis, and time interval between cataract surgeries.
Results: The mean age was 71.26 ± 10.84 (range, 25-90) years, mean interval between surgery in each eye was 118.46 ± 183.50 (range, 17-1,018) days, and mean postoperative diopter difference was 1.16 ± 0.53 (range, 0.00-2.75) diopters. After bilateral cataract surgery, 22 patients (31.43%) experienced a change in eye dominance, whereas 48 patients (68.57%) experienced no change. There were no differences in the time interval between cataract surgeries, preoperative UCDVA and UCNVA, pre- and postoperative BCVA, or stereopsis in either group. Patients who experienced a change in eye dominance showed smaller differences between preoperative and postoperative spherical equivalent, compared with patients who experienced no change in eye dominance (t-test, p < 0.05).
Conclusions: Twenty-two (31.43%) patients whose nondominant eyes were targeted for near vision showed altered eye dominance after conventional monovision cataract surgery. Eye dominance shows greater plasticity in patients with smaller differences between preoperative and postoperative spherical equivalent.
Keywords : Bilateral cataract surgery, Conventional pseudophakic monovision, Presbyopia, Ocular dominance


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