The Clinical Feature and Surgical Outcome of Infantile Exotropia.

Lee, Ho Won; Park, Sung Eun; Oh, Sei Yeul

Original Article

Journal of the Korean Ophthalmological Society 2004;45(11):1899-1905.
Published online November 1, 2004.

The Clinical Feature and Surgical Outcome of Infantile Exotropia.

¹Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. syoh@smc.samsung.co.kr
²Department of Ophthalmology, Eulji Medical Center, School of Medicine, Eulji University, Seoul, Korea.

영아외사시의 임상 특징과 수술 성적

이호원 ( Ho Won Lee ) , 박성은 ( Sung Eun Park ) , 오세열 ( Sei Yeul Oh )

Abstract

PURPOSE
To investigate the clinical features and treatment of infantile exotropia which developed in the first year of life. METHODS: The medical records of infantile exotropia operated on in our hospital were reviewed for preoperative and postoperative deviation, cycloplegic refraction, Worth 4-dot test and Titmus stereo acuity test. RESULTS: Preoperative mean deviation was 37 prism diopters. The average post-operative follow-up period was 26.5 months (12~86 months). Twelve patients (71%) had successful horizontal alignment with final horizontal deviations of less than 8 prism diopters, and five patients were undercorrected between 10 and 20 prism diopters. None were overcorrected. Six patients (35%) had fusion at distance and near as well as stereoacuity of 200 seconds of arc or less. Both preoperative and postoperative associated anomalies were inferior oblique muscle overaction (35%), dissociated vertical deviation (18%), both inferior oblique muscle overaction and dissociated vertical deviation (18%), nystagmus (12%) and V-pattern (6%). CONCLUSION: Although infantile exotropia is rare, it has similarities to infantile esotropia. Infantile exotropia features a large-angle deviation, accompanied with inferior oblique muscle overaction and dissociated vertical deviation. After operation, no cases were overcorrected, while high levels of binocular function, and stereoacuity developed in some cases.

Key Words: Infantile exotropia;Large angle deviation;Stereoacuity