Changes in the axis of astigmatism: a longitudinal study.
Changes in the axis of astigmatism have been followed up in the same individuals over several decades. Only a proportion of subjects with direct astigmatism in their youth change to inverse astigmatism by way of oblique astigmatism.
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Saunders
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001251:Astigmatism / Q000453:epidemiology / Q000503:physiopathology*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D012029:Refraction, Ocular