title: High corneal astigmatism in the adult Navajo population.
abstract: Corneal astigmatism was measured in 176 unselected Navajo patients over the age of 45 years old. The result was a 4% incidence of with-the-rule astigmatism of two diopters or more in at least one eye. Conjectures on a reason for the small incidence of high corneal astigmatism in the adult Navajo population as compared to the large incidence that occurs in Navajo children is discussed.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001130:Arizona; D001251:Astigmatism / Q000453:epidemiology* / Q000209:etiology; D002648:Child; D005260:Female; D006801:Humans; D007198:Indians, North American; D008297:Male; D008875:Middle Aged; D009516:New Mexico