일산 소재 초등학생의 굴절이상도와 비구면계수 관계

• Published in: Daihan angwa haghoi jabji Vol. 49; no. 8; pp. 1317 - 1322
• Main Authors: 김수영, Su Young Kim, 최정훈, Jeong Hoon Choi, 박영훈, Young Hoon Park, 장봉순, Bong Soon Chang, 마기중, Ki Choong Mah, 이영춘, Young Chun Lee
• Format: Journal Article
• Language: Korean
• Published: 대한안과학회 15.08.2008
• Subjects: Asphericity; Axial Length; Myopia; Refractive error; 안과학; Axial length; Asphericity; Myopia; Refractive error
• ISSN: 0378-6471; 2092-9374

목적: 일산 소재 초등학생을 대상으로 굴절이상도, 비구면계수, 안축장을 측정하여 각각의 상관관계를 알아보고자 하였다. 대상과 방법: 안질환이 없는 일산 거주 초등학생 56명 111안을 대상으로, 각막형상측정계를 사용하여 이심률(eccentricity)을 측정하여, 비구면계수를 계산 후, 굴절이상도, 안축장, 비구면계수와의 상관관계를 분석하였다. 결과: 대상 학생들의 평균나이는 9.99±1.33세(8~12세)였으며, 구면렌즈 대응치는 -1.38±2.08D, 안축장은 23.84±1.17 ㎜, 비구면계수(asphericity)는 -0.29±0.10이었다. 안축장이 길어질수록 근시도가 높아졌으며, 구면렌즈 대응치와 안축장은 높은 상관성을 보였고(p<0.0001), 근시도가 증가할수록 비구면계수는 음(-)의 방향으로 증가하였고, 상관성이 있었다(p=0.019). 또한, 안축장이 증가할수록 비구면계수도 유의하게 음(-)의 방향으로 증가하였다(p=0.012). 결론: 근시도가 증가할수록 비구면계수가 음(-)의 방향으로 증가하였다. 이러한 연구 결과를 일반화하기 위해서는 장기적인 관찰과 좀 더 광범위한 조사가 필요하다. Purpose: To determine the relationships among refractive error, corneal asphericity, and axial length in elementary school students. Methods: One hundred eleven eyes from 56 subjects were included in this study. All subjects underwent cycloplegic refraction corrected to the spherical equivalent. Axial length was measured, and corneal topography was performed. Corneal asphericity was assessed using eccentricity (e) calculated according to the formula Q=-e2. The relationship among spherical equivalent, asphericity, and axial length was determined using a linear regression model. Results: Subjects were between 8 and 12 years of age (mean, 9.99±1.33). The average spherical equivalent was-1.38±2.08D (-7.13~2.63D), the average axial length was 23.84±1.17 ㎜ (20.10~26.37 ㎜), and the average corneal asphericity was -0.29±0.10 (-0.55~-0.07). An increase in myopia was positively correlated with an increase in axial length (p<0.0001). The degree of myopia was negatively associated with corneal asphericity (p=0.019). An increase in axial length was related to an increase of negativity in asphericity (p=0.012). Conclusions: An increase in myopia was correlated with an increase in axial length. As the degree of myopia and axial length increased, corneal asphericity became more prolate. A longitudinal study with more subjects is required to validate these results.