Prevalence of Amblyopia and Strabismus in White and African American Children Aged 6 through 71 Months: The Baltimore Pediatric Eye Disease Study

Published on Nov 1, 2009in Ophthalmology8.47
· DOI :10.1016/J.OPHTHA.2009.04.034
David S. Friedman93
Estimated H-index: 93
(Johns Hopkins University),
Michael X. Repka67
Estimated H-index: 67
(JHUSOM: Johns Hopkins University School of Medicine)
+ 4 AuthorsJames M. Tielsch118
Estimated H-index: 118
(Johns Hopkins University)
Sources
Abstract
Objective To determine the age-specific prevalence of strabismus in white and African American children aged 6 through 71 months and of amblyopia in white and African American children aged 30 through 71 months. Design Cross-sectional, population-based study. Participants White and African American children aged 6 through 71 months in Baltimore, MD, United States. Among 4132 children identified, 3990 eligible children (97%) were enrolled and 2546 children (62%) were examined. Methods Parents or guardians of eligible participants underwent an in-home interview and were scheduled for a detailed eye examination, including optotype visual acuity and measurement of ocular deviations. Strabismus was defined as a heterotropia at near or distance fixation. Amblyopia was assessed in those children aged 30 through 71 months who were able to perform optotype testing at 3 meters. Main Outcome Measures The proportions of children aged 6 through 71 months with strabismus and of children aged 30 through 71 months with amblyopia. Results Manifest strabismus was found in 3.3% of white and 2.1% of African American children (relative prevalence [RP], 1.61; 95% confidence interval [CI], 0.97–2.66). Esotropia and exotropia each accounted for close to half of all strabismus in both groups. Only 1 case of strabismus was found among 84 white children 6 through 11 months of age. Rates were higher in children 60 through 71 months of age (5.8% for whites and 2.9% for African Americans [RP, 2.05; 95% CI, 0.79–5.27]). Amblyopia was present in 12 (1.8%) white and 7 (0.8%) African American children (RP, 2.23; 95% CI, 0.88–5.62). Only 1 child had bilateral amblyopia. Conclusions Manifest strabismus affected 1 in 30 white and 1 in 47 African American preschool-aged children. The prevalence of amblyopia was Financial Disclosure(s) The authors have no proprietary or commercial interest in any of the materials discussed in this article.
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