목 적: 20.30대 청장년층을 대상으로 전난시, 각막난시, 잔여난시의 빈도 및 난시도를 측정하고 전난시와 각막난시, 각막난시와 잔여난시의 상관성을 분석하였다 방 법 : 안질환 및 전신질환이 없으며 사시와 약시가 없는 마산지역 대학생(남자 43명, 여 36명) 154안을 대상으로 전난시, 각막난시, 잔여난시도를 측정하여 분석하였다.ARK(KR-8100P, TOPCON, Japan)를 이용하여 전난시 및 각막난시를 측정하고 그에 따른 잔여난시를 얻어 각각의 빈도 및 난시도의 변화를 분석하였다. 단, 3회 측정 후 평균을 이용하였다. 결 과 : 전체난시(202안)는 직난시에서 (124안, 61.4%)로 가장 높은 빈도를 보였다. 사난시를 제외한(154안) 각막난시는 직난시에서 (147안, 95.5%), 잔여난시는 도난시에서 (119안, 77.2%)로 가장 높은 빈도를 보였다. 구면굴절이상값에 따른 난시도 분석 결과 구면굴절이상도에 따라 난시도는 비례적으로 증가하였다. 전체난시와 잔여난시는 뚜렷한 양적상관관계(r=0.53, p

Purpose : Many methods of residual astigmatism measurement are available clinically. In this study, residual astigmatism was examined and compared various tests of residual astigmatism measurement. Method : Subjects(54 males, 53 females) without ocular pathology and ocular surgical history were recruited from the college students. Noncycloplegic subjective and objective refraction were performed. And after wearing RGP lenses, objective refraction were performed. Result : The means Jo and J4s components of total astigmatism were +0.26±0.38D and -0.01±0.14D with subjective refraction. +0.29±0.39D and -0.03±0.17D with objective refraction and +0.34±0.51D and - 0.28±0.22D with Javal's rule, respectively, There was significantly difference in three methods measuring total astigmatism(p(O. 05) . Measuring the residual astigmatism with difference between total astigmatism and corneal astigmatism, the means Jo and J4s components of residual astigmatism were - 0.21±0.28D and +0.21±0.18D with subjective refraction, -0.17±0.32D and +0.20±0.17D with objective refraction, -0.13±0.10D and - 0.06± 0.04D with Javal's rule. and there was significantly difference(p(0.05). The means Jo and J4s components of residual astigmatism were - 0.18±0.25D and +0.20±0.16D with rest values reported auto- refractor and - 0,14±0.24D and - 0.06±0,17D after wearing RGP contact lenses. Conclusion : There were individual differences in means and standard deviations of residual astigmatism in each method. Therefore, it is important to consider residual astigmatism with total astigmatism and corneal astigmatism in clinic.