Common forms of childhood exotropia☆
Section snippets
Materials and methods
The medical records of all exotropic children younger than 19 years evaluated in the Division of Ophthalmology at East Tennessee State University College of Medicine, Johnson City, Tennessee from August 1, 1995 through July 31, 2001 were reviewed retrospectively. Approval from the institutional review board at East Tennessee State University was obtained. The geographic region of the study is predominantly rural, with no other pediatric ophthalmologists serving the population. In 1995, the
Results
Two hundred forty-nine consecutive children were evaluated for exotropia during the study period. Fourteen of the 249 patients were excluded for a history of strabismus surgery. The observed forms of exotropia among the remaining 235 study patients are shown in Table 1. Intermittent exotropia was the most common form of childhood exotropia, comprising 47.7% of the study patients. Ten (8.9%) of the 112 patients with intermittent exotropia displayed a constant deviation at their initial
Discussion
Intermittent exotropia was the most common form of childhood exotropia in this population, accounting for nearly half of the study patients. The only similar study on review found intermittent exotropia (comprised of both a deviation greater at distance than near and a deviation equal at distance and near) occurring in 81.3% of patients with exotropia,7 although the investigation was undertaken in a large urban center and the ages of the patients were not specified. Friedman and associates8
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Manuscript no. 220861.