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The Analysis of Ocular Deviations between Dominant and Non-dominant Eye Using Video-oculography in Intermittent Exotropia
간헐외사시에서 비디오안구운동검사를 통한 주시안과 비주시안의 안구편위에 대한 분석
JKOS 2019 Jul;60(7):685-91
Published online July 15, 2019;  https://doi.org/10.3341/jkos.2019.60.7.685
Copyright © 2019 The Korean Ophthalmological Society.
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Ji Hoon Ban, MD1,2, Sung Hyuk Moon, MD, PhD1,2
반지훈1,2⋅문성혁1,2

Department of Ophthalmology, Busan Paik Hospital, Inje University College of Medicine1, Busan, Korea
T2B Infrastructure Center for Ocular Disease, Busan Paik Hospital, Inje University College of Medicine2, Busan, Korea
인제대학교 의과대학 부산백병원 안과학교실1, 인제대학교 의과대학 부산백병원 안과질환 T2B 기반구축센터2
Received February 13, 2019; Revised March 12, 2019; Accepted June 19, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Purpose: To measure and analyze ocular deviations between dominant and non-dominant eyes using video-oculography (VOG) in intermittent exotropia.
Methods: Fourteen subjects who were diagnosed with intermittent exotropia from July 2017 to July 2018 with age of 5 or more, visual acuity of 20/30 or better and corrected visual acuity of 20/25 or more and difference in vision of both eyes of 1 line or less on Snellen optotype were included. The subjects were asked to fixate on a black-on-white optotype at 1 m, which subtended a visual angle of 50 minutes of arc. The video files and data about ocular deviations were obtained using VOG with alternate cover test. We analyzed angles of ocular deviations in dominant and non-dominant eyes.
Results: Among the 14 subjects in this study, the mean age were 7.6 ± 1.7 (range 5-9 years). Seven of 14 subjects had the right eye dominance. Six of the 14 subjects were men. There was no significant difference of ocular deviations between the dominant and non-dominant eyes in VOG (p = 0.167). Additionally, there was no significant difference of the values of VOG when one eye was exodeviated or re-fixated (p = 0.244), when both eyes were deviated, and when both eyes were re-fixated (p = 0.195, 0.637).
Conclusions: In this study, there was no significant difference of ocular deviations between the dominant and non-dominant eyes, between when an eye was exodeviated or fixated using VOG. Therefore, it may not be a problem even if alternate prism cover test is performed in any eye in intermittent exotropia of more than 50 prism diopter without amblyopia or refraction abnormality that could affect the uncorrected visual acuity.
Keywords : Intermittent exotropia, Ocular deviations, Strabismus, Video-oculography

 

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