Prevalence of corneal astigmatism in Tohono O'odham Native American children 6 months to 8 years of age

Erin M. Harvey, Velma Dobson, Joseph M. Miller, Jim Schwiegerling, Candice E. Clifford-Donaldson, Tina K. Green, Dawn H. Messer

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Purpose. To describe the prevalence of corneal astigmatism in infants and young children who are members of a Native American tribe with a high prevalence of refractive astigmatism. Methods. The prevalence of corneal astigmatism was assessed by obtaining infant keratometer (IK4) measurements from 1235 Tohono O'odham children, aged 6 months to 8 years. Results. The prevalence of corneal astigmatism >2.00 D was lower in the 1- to <2-year-old age group when compared with all other age groups, except the 6- to <7-year-old group. The magnitude of mean corneal astigmatism was significantly lower in the 1- to <2-year age group than in the 5- to <6-, 6- to <7-, and 7- to <8-year age groups. Corneal astigmatism was with-the-rule (WTR) in 91.4% of astigmatic children (≥1.00 D). Conclusions. The prevalence and mean amount of corneal astigmatism were higher than reported in non-Native American populations. Mean astigmatism increased from 1.43 D in 1-year-olds to nearly 2.00 D by school age.

Original languageEnglish (US)
Pages (from-to)4350-4355
Number of pages6
JournalInvestigative Ophthalmology and Visual Science
Volume52
Issue number7
DOIs
StatePublished - Jun 2011

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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