Relationship between astigmatism and aging in middle-aged and elderly japanese

@article{Asano2004RelationshipBA,
  title={Relationship between astigmatism and aging in middle-aged and elderly japanese},
  author={Kazuko Asano and Hideki Nomura and Makiko Iwano and Fujiko Ando and Naoakira Niino and Hiroshi Shimokata and Yozo Miyake},
  journal={Japanese Journal of Ophthalmology},
  year={2004},
  volume={49},
  pages={127-133}
}
PurposeTo study the effect of aging on astigmatism in adult Japanese.MethodsMeasurements of refractive errors and keratometry were performed on 2161 randomly selected subjects (aged 40–79 years). The relation between age and the net value in diopters (D) of astigmatism was evaluated with a trend test. The relation between age and the polar value was also examined by linear regression analysis.ResultsThe mean (±SD) value of total and corneal astigmatism was −0.97 ± 0.72 D and −0.86 ± 0.63 D… 
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