Spherical equivalent refractive error in preschool children from a population with a high prevalence of astigmatism

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Abstract

PURPOSE. To describe spherical equivalent (sph eq) refractive errors in preschool members of a Native American tribe with a high prevalence of astigmatism. METHODS. Cycloplegic autorefraction measurements were obtained for 819 three- and four-year-old Tohono O'odham children, with follow-up measurements in 146 after 4 to 8 years. RESULTS. Mean sph eq was significantly more hyperopic in the astigmatic group than in the non-astigmatic group (1.24 vs. 0.87 D). At follow-up, prevalence of hyperopic sph eq and hyperopic astigmatism had significantly decreased, and prevalence of emmetropic/myopic sph eq and myopic astigmatism had significantly increased. The decrease in mean sph eq was similar in astigmats and non-astigmats. Astigmatism did not change over time. CONCLUSIONS. Most preschool children in this highly astigmatic population are hyperopic, with astigmats showing higher mean hyperopic sph eq than non-astigmats. Astigmats and non-astigmats show a similar decrease in amount of hyperopic sph eq over follow-up of 4 to 8 years.

Original languageEnglish (US)
Pages (from-to)124-130
Number of pages7
JournalOptometry and Vision Science
Volume84
Issue number2
DOIs
StatePublished - Feb 1 2007

Keywords

  • Epidemiology
  • Infant/pediatric vision
  • Refractive error

ASJC Scopus subject areas

  • Ophthalmology
  • Optometry

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