title: Etiology of astigmatism.
abstract: A large amount of evidence suggests that astigmatism is hereditary. Other evidence indicates that the prevalence of astigmatism varies widely between and within racial groups and that both the direction and the amount of astigmatism tend to vary as a function of age and in response to environmental influences.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001251:Astigmatism / Q000175:diagnosis / Q000209:etiology* / Q000235:genetics; D002170:Canada; D002648:Child; D002675:Child, Preschool; D003261:Contact Lenses / Q000009:adverse effects; D003263:Contact Lenses, Hydrophilic / Q000009:adverse effects; D003315:Cornea / Q000473:pathology; D005260:Female; D006801:Humans; D007198:Indians, North American; D007223:Infant; D008297:Male; D008875:Middle Aged