Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
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Ten-year Refractive Error and Astigmatism Changes in Korean Subjects

한국인의 10년간 굴절이상과 난시 축 변화

  • Ha, Na-Ri (Department of Optometry, Konyang University) ;
  • You, Jung-Kone (Department of Optometry, Konyang University) ;
  • Kim, Jai-Min (Department of Optometry, Konyang University)
  • 하나리 (건양대학교 안경광학과) ;
  • 유정곤 (건양대학교 안경광학과) ;
  • 김재민 (건양대학교 안경광학과)
  • Received : 2010.11.17
  • Accepted : 2010.12.18
  • Published : 2010.12.31
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Abstract

Purpose: This study was to investigate the changes of refractive error and astigmatism associated with age in Korean subjects between the ages of 6 and 80 years during 10-year period. Methods: 220 normal subjects (345 eyes) who visited ophthalmic clinic was recruited and followed for 10 years between 1999 and 2009, cycloplegic manifest refraction being performed annually. Visual acuity was tested on a Han's chart. Results: The mean 10-year change in the spherical equivalent refraction (SER) of age 6 to 10 years old and 10 to 20 years was -3.649D and -2.165D respectively. There was no change of refractive error in age 21 to 40 years. The myopic shift decreased with age from 41 up to 69 years but increased slightly in patients 70 years and older; the hyperopic shift showed the opposite trend. The distribution of refractive error over the 10 years in aged 6 to 10 and 11 to 20 years was shifted myopic. The incidence of medium (> -3.01D) to high myopia at age 6 to 10 years was 4.8% and after 10 years was 62.5%. The 10-year change of astigmatism axis was in "with the rule" direction for younger age group and in a "against the rule" direction for older subjects. Conclusions: This study has documented refractive error changes in Korean subjects and confirmed reported trends of myopic shift from age 6-20 years and hyperopic shift before age 70 years and a myopic shift thereafter. The axis of astigmatism turns to "against the rule" after 40's.

목적: 본 연구는 한국인 6~80세를 대상으로 10년 동안 굴절이상과 난시축의 변화를 조사하기 위해 시행되었다. 방법: 1999년부터 2009년까지 안과 병원을 내원한 220명(345안)을 대상으로 10년 동안 매년 조절마비 굴절검사를 포함한 현성 굴절검사를 실시하였다. 시력검사는 한천석식 시표를 사용하였다. 결과: 6~10세와 11~20세 그룹의 10년간 구면등가 굴절력의 변화는 각각 -3.649D와 -2.165D였다. 21~40세 그룹은 굴절이상의 변화가 없었다. 41세에서 69세까지는 근시 쪽으로 진행이 감소하다가 70세 이상에서는 약간 증가하였으며 원시 쪽으로 진행은 반대 경향을 보였다. 6~10세와 11~20세 그룹에서는 10년 동안 굴절이상 분포가 근시 쪽으로 진행되었다. 6~10세 그룹에서 중등도(> -3.01D) 이상의 근시 빈도가 4.8% 였으나 10년 후에는 62.5%를 보였다. 난시 축의 10년 동안 변화는 젊은층은 직난시를 보였으나 나이가 들수록 도난시 쪽으로 진행하였다. 결론: 본 연구는 한국인의 굴절이상 변화가 6~20세 그룹은 근시 쪽으로 진행하다가 70세 이전까지 원시 쪽으로 진행한 후 다시 근시 쪽으로 진행하는 것으로 나타났다. 난시 축은 40대 이후 도난시 쪽으로 변하였다.

Keywords

References

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