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Kim, Park, and Shin: The Changes in the Cornea and Anterior Chamber after Lateral Rectus Muscle Recession in Intermittent Extropia
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(1): 127-132.

Published online: 16 January 2012

DOI: https://doi.org/10.3341/jkos.2012.53.1.127

The Changes in the Cornea and Anterior Chamber after Lateral Rectus Muscle Recession in Intermittent Extropia

Boyun Kim, MD, Shin Hae Park, MD, Sun Young Shin, MD

Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.

Address reprint requests to Sun Young Shin, MD. Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, The Catholic University of Korea, #222 Banpo-daero, Seocho-gu, Seoul 137-701, Korea. Tel: 82-2-2258-1188, Fax: 82-2-590-7405, eyeshin@ca®tholic.ac.kr

Received 14 April 2011       Accepted 23 November 2011

Copyright © 2012 The Korean Ophthalmological Society

Abstract

Purpose

To investigate changes in corneal keratometry and the anterior chamber in intermittent exotropia after lateral rectus recession using Pentacam.

Methods

Corneal keratometry, anterior chamber depth, and anterior chamber volumes were evaluated preoperatively and at 1 week, 1 month, and 2 months postoperatively using Pentacam in 20 patients (40 eyes) who underwent lateral rectus muscle recession. The IOP was measured before and after lateral rectus muscle detachment during the surgery. According to the change in IOP, the patients were divided into 2 groups; Group 1 (ΔIOP < 3 mm Hg) and Group 2 (ΔIOP ≥ 3 mm Hg), and the results of the 2 groups were compared.

Results

The horizontal keratometry and anterior chamber volumes significantly decreased 1 week postoperatively, although there were no significant differences in vertical keratometry, mean keratometry, or anterior chamber depth. Additionally, there were no significant changes in any measurement parameters at 1 month or 2 months postoperatively. In Group 2, horizontal keratometry, mean keratometry, and anterior chamber volumes showed significant reduction compared with those in Group 1. There were no significant differences between the 2 groups at 1 month postoperatively.

Conclusions

Postoperative corneal keratometry and anterior chamber volumes did not change significantly compared to preoperative values in intermittent exotropia after performing lateral rectus muscle recession. However, the higher the ocular muscle tension, the greater were the changes in corneal astigmatism and anterior volumes.

Keywords: Anterior chamber volume, Corneal keratometry, Lateral rectus muscle recession, Pentacam

Figures and Tables

Table 1
Preoperative patient demographics
jkos-53-127-i001

Results are expressed as mean ± standard deviation or number.

Table 2
Preoperative and postoperative keratometric values and anterior segment parameters using pentacam
jkos-53-127-i002

Results are expressed as mean ± standard deviation.

K= keratometry; ACD = anterior chamber depth; ACV = anterior chamber volume.

*p < 0.05: ANOVA and multiple comparison using Tukey test; †p-value was measured by repeated measured ANOVA on ranks.

Table 3
Comparison of group 1 and group 2 about preoperative and postoperative keratometric values and anterior segment parameters
jkos-53-127-i003

Results are expressed as mean ± standard deviation.

*Patients whose IOP change were <3 mm Hg; †Patients whose IOP change were ≥3 mm Hg; ‡p-value was determined by Mann-Whitney U-test; §p < 0.05.

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