A Longitudinal Study for 3 Years on Myopic Refractive Error Changes of Myopic Children Among Patients of a Korean Optometry Clinic

국내 한 안경원을 방문한 근시 어린이의 3년간 근시도 변화의 추적 연구

  • Kim, Jin-Suk (Dept. of Optometry, Gimcheon University) ;
  • Kim, Jae-Do (Dept. of Optometry and Vision Science, Kyungwoon University)
  • Received : 2012.08.01
  • Accepted : 2012.09.15
  • Published : 2012.09.30

Abstract

Purpose: To investigate amount of myopic progression with increase of age for children myopes among patients of a Korean optometry clinic. Methods: It has followed up 99 children subjects (male 55, female 44) who had no ocular disease and have visited a Korean optometric clinic for mean $33{\pm}8$ months (13 to 54 months) since June of 2001. Mean age of subjects at first visit was $118{\pm}23$months. Non-cycloplegic refractive error were measured 6 times using Canon RK-3(Japan) every mean 6 months. Results: For all subjects mean of refractive errors increased -0.78 D per year from $-2.02{\pm}1.05D$ at first visit to $-4.18{\pm}1.30D$ at final visit with longitudinal study, but -0.19 D per year with cross-section study, which showed a big difference between two methods. Mean of astigmatic refractive error increased -0.15 D per year. As progression of refractive error according to ages at first visit, refractive errors increased -1.04 D per year for 6 years old, -0.9 D for 7 years old, -0.89 D for 8 years old, -0.89 D for 9 years old, -0.74 D for 10 years old, -0.74 D for 11 years old and -0.72 D for 12 years old. And it showed a tendency that the younger age was the higher progression of myopia. However it was not significantly different between each groups. Conclusions: Follow-up results for myopic children among patients of a Korean optometry clinic showed increase of -0.78 D for myopic refractive error and -0.14 D for astigmatic refractive error per year.

목적: 우리나라 안경원을 방문한 근시 어린이를 다년간 추적 조사하여 성장에 따른 근시의 진행 정도를 파악하고자 하였다. 방법: 2001년 6월 이후 안경원을 방문한 안과적인 질환이 없는 98명(남 54, 여 44)의 어린이를 대상으로 평균 33${\pm}$8개월(13개월에서 54개월) 간 추적관찰 했다. 대상자의 최초 방문 시점에서 연령은 평균 118${\pm}$23개월 이었다. 굴절이상도는 조절마비제를 사용하지 않고 Canon RK-3로 평균 6개월 마다 약 6회를 측정하였다. 결과: 최초 방문 시 전체 대상자의 평균 굴절이상도는 $-2.02{\pm}1.05D$였고 평균 33개월간 추적 조사한 결과인 종단연구에 의한 방법은 $-4.18{\pm}1.30D$로 연평균 -0.78 D 증가 하였지만 비추적 관찰인 횡단연구에 의한 방법은 평균 약 -0.19 D가 증가하여 두 가지 방법의 결과는 상당한 차이를 보여주었다. 전체 대상자의 평균 난시도는 연평균 -0.14 D 상승하였다. 각 연령별 굴절이 상도의 변화 추이를 분석한 결과 최초 방문 연령이 6세인 그룹은 매년 -1.04 D, 7세는 -0.90 D, 8세는 -0.89 D, 9세 -0.89 D, 10세 -0.74 D, 11세 -0.74 D, 12세 -0.72 D씩 근시가 증가하여 연령이 어릴수록 근시도의 증가폭이 컸으나 통계적으로 유의한 수준은 아니었다. 결론: 국내 한 안경원을 방문한 어린이를 대상으로 굴절이상도를 추적관찰한 결과 근시도는 매년 -0.78 D 증가하였고 이와 함께 근시성 난시도도 -0.14 D 증가하는 경향을 보였다.

Keywords

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