The Period of Overcorrection after Surgery According to Age in Pediatric Patients with Intermittent Exotropia

Sung Won Cho; Suk Gyu Ha; Seung Hyun Kim

doi:10.3341/jkos.2019.60.2.176

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Cho, Ha, and Kim: The Period of Overcorrection after Surgery According to Age in Pediatric Patients with Intermittent Exotropia

Original Article

Journal of the Korean Ophthalmological Society 2019; 60(2): 176-180.

Published online: 15 February 2019

DOI: https://doi.org/10.3341/jkos.2019.60.2.176

The Period of Overcorrection after Surgery According to Age in Pediatric Patients with Intermittent Exotropia

Sung Won Cho, MD, Suk Gyu Ha, MD, PhD, Seung Hyun Kim, MD, PhD

Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.

Address reprint requests to Seung Hyun Kim, MD, PhD. Department of Ophthalmology, Korea University Anam Hospital, #73 Inchon-ro, Seongbuk-gu, Seoul 02841, Korea. Tel: 82-2-920-5520, Fax: 82-2-924-6820, ansaneye@hanmail.net

Received 19 July 2018 Revised 8 September 2018 Accepted 18 January 2019

The Korean Ophthalmological Society

(open-access):

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 investigate the recovery period of overcorrection and related factors after surgery in pediatric patients with basic intermittent exotropia (XT).

Methods

Retrospective chart reviews of the medical records of patients who underwent bilateral lateral rectus recession for basic XT were analyzed. Preoperative age, sex, angle of deviation (prism diopters [PD]), and suppression at distance were measured. Patients were observed every week when the angle of deviation was > 2 PD of overcorrection at postoperative day 1. Recovery of overcorrection was defined as improvement of overcorrection with orthotropia. Patients were divided into two groups according to age: younger (group 1) and older (group 2) than 10 years of age. Success was defined as an angle of deviation between 10 PD of exodeviation and 5 PD of esodeviation at the final visit.

Results

A total of 88 patients were included. At postoperative day 1, the angle of deviation at distance was −6.9 ± 2.2 PD, and the near angle of deviation was −6.9 ± 2.4 PD. Esodeviation presented as a minus value. The recovery period of overcorrection was 1.9 ± 3.9 weeks and the success rate was 80.7% (71 patients). The success rates of group 1 and group 2 were not statistically significant (p = 0.51). The recovery period of overcorrection in group 2 (2.7 ± 5.9 weeks) was significantly longer than in group 1 (1.8 ± 3.4 weeks) (p = 0.02).

Conclusions

In pediatric adolescents with basic XT, the surgical success rates did not differ significantly according to age, but recovery of overcorrection after strabismus surgery took longer in patients ≥ 10 years of age.

Keywords: Intermittent exotropia, Overcorrection, Pediatric adolescents

Figures and Tables

Figure 1

Comparison of recovery period of overcorrection between group 1 and 2. The recovery period of overcorrection in group 2 (2.7 ± 5.9 weeks) was significantly longer than in group 1 (1.8 ± 3.4 weeks) (p = 0.02). p-value was calculated by Mann-Whitney U test. PD = prism diopters.

Table 1

Demographics in this study

Values are presented as mean ± standard deviation (range) or number (%) unless otherwise indicated.

PD = prism diopters; D = diopters.

Table 2

Surgical outcome at postoperative day 1 and final visit

Values are presented as mean ± standard deviation (range) or number (%).

PD = prism diopters.

^*Minus means esodeviation.

Table 3

Comparison of clinical features between group 1 and 2

Values are presented as mean ± standard deviation (range) or number (%).

PD = prism diopters; POD = postoperative.

^*Mann-whitney U test; ^†Minus means esodeviation.

Notes

^{Conflicts of Interest} The authors have no conflicts to disclose.

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