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Lee, Ha, and Lew: Clinical Characteristics of Intermittent Exotropia Patients who Have Improved due to Corrected Refractive Errors
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(6): 819-824.

Published online: 16 June 2012

DOI: https://doi.org/10.3341/jkos.2012.53.6.819

Clinical Characteristics of Intermittent Exotropia Patients who Have Improved due to Corrected Refractive Errors

Jae Yeun Lee, MD, Sung Woo Ha, MD, Helen Lew, MD

Department of Ophthalmology, Bundang CHA Medical Center, CHA University, Seongnam, Korea.

Address reprint requests to Helen Lew, MD. Department of Ophthalmology, Bundang CHA Hospital, #59 Yatap-ro, Bundang-gu, Seongnam 463-712, Korea. Tel: 82-31-780-5330, Fax: 82-31-780-5333, eye@cha.ac.kr

Received 2 August 2011       Accepted 7 April 2012

Copyright © 2012 The Korean Ophthalmological Society

Abstract

Purpose

To evaluate clinical features of patients who have experienced decreased exodeviation after refractive error correction.

Methods

Thirty-four patients who experienced decreased exodeviation after refractive error correction between 2003 and 2010 were evaluated. Visual acuity, refractive errors, reported age at onset, duration of wearing glasses, stereopsis, and function of fusion were evaluated.

Results

The present study included 34 patients with intermittent exotropia. Before correcting refractive errors, the mean visual acuity was 0.34 ± 0.27 for the right eye and 0.37 ± 0.27 for the left eye according to log MAR. After refractive error correction, mean visual acuity improved to 0.12 ± 0.11 for the right eye and 0.11 ± 0.11 for the left eye according to log MAR. Before correcting refractive errors, the amount of deviation was 18.1 ± 7.4 PD at near and 13.5 ± 8.4 PD at far. However, after correcting refractive errors, the amount of deviation decreased to 5.8 ± 8.6 PD at near and 4.5 ± 7.6 PD at far (p < 0.05).

Conclusions

The clinical characteristics of children who have decreased exodeviation after correcting refractive errors is shown by a greater amount of deviation at near than at distance and good fusional vergence and stereoacuity. Because correcting refractive errors by wearing appropriate glasses can decrease exodeviation, the authors of the present study recommend correcting refractive errors as the initial management for exotropia.

Keywords: Intermittent exotropia, Myopia, Refractive errors

Figures and Tables

Figure 1
Amount of deviation improved after correcting refractive errors.
jkos-53-819-g001
Figure 2
Stereoacuity in patients.
jkos-53-819-g002
Figure 3
Correlation of amount of corrected refractive errors and amount of deviation improved.
jkos-53-819-g003
Table 1
Patient demographics
jkos-53-819-i001
Table 2
Fusion test by worth-4-dot test
jkos-53-819-i002

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