학동기 근시 환아 굴절검사시 근시 과교정 방지를 위한 두가지색 굴절검사의 유용성

목적 : 학동기 근시 아동의 굴절검사시 근시 과교정을 방지하기 위한 두가지색 굴절검사(Duochrome test)의 유용성을 알아보고자 하였다. 대상과 방법 : 교정시력 1.0인 6～12세의 근시 환아 44명(88안)을 대상으로 자동굴절검사기(KR-8100, Topcon)로 측정한 굴절력(MR)을 측정한 후, 두가지색 굴절검사의 굴절력(DR)을 측정하였으며 그 이후 조절마비하에서의 굴절력(CR)을 측정하여 각각의 근시정도를 비교, 분석하였다. 결과 : 대상의 연령은 평균 8.7±1.70세였고, 3가지 검사에 의한 근시 정도의 평균은 우안이 각각 MR -1.9D±0.89 (-0.75~-4.75D), DR -1.5D±0.83, CR -1.5D±0.85 이었고, 좌안은 각각 -2.0D±0.79, -1.7D±0.76, -1.6D±0.77 이었다. MR과 DR, MR과 CR 값은 각각 통계적으로 유의한 차이를 보였으나(각각 p=0.000, 0.000), DR과 CR 값은 통계적으로 유의한 차이를 보이지 않았다(p=0.102). 결론 : 두가지색 굴절검사는 간편하게 근시 과교정을 방지할 수 있으며 조절마비하 굴절이상 정도를 예측할 수 있는 유용한 검사법이라 할 수 있겠다. Purpose: This study investigates the usefulness of the duochrome test for the prevention of overcorrection in refraction tests of myopic children. Methods: This prospective study comprises 44 subjects (88 eyes, aged 6 to 10 years) with simple myopia and best-corrected visual acuity of 20/20. After the manifest refraction (MR) was measured with an autorefractometer (KR-8100, Topcon), the refractive error of the duochrome test (DR) was measured at the end point when targets of red and green appeared equally clear. The cycloplegic refraction (CR) was then measured. A statistical analysis and comparison of MR, DR, and CR were conducted using a paired t-test. With strabismus, amblyopia and astigmatism (≥0.5D), it was excluded. Results: The mean age of the subjects was 8.7±1.70 years (range, 6 to 12 years). Mean refractive errors found by MR, DR, and CR were -1.9D±0.89 (range, -0.75 to -4.75D), -1.5D±0.83, -1.5D±0.85 in the right eye, respectively. Those found by MR, DR, and CR in the left eye were -2.0D±0.79 (range, -0.75 to -4.75D), -1.7D±0.76, and -1.6D±0.77, respectively. Differences in the refractive errors of MR and DR, MR and CR were statistically significant (p=0.000, p=0.000 respectively), but there was no statistically significant difference between the refractive errors of DR and CR.(p=0.102) Conclusions: We found the duochrome test to be an easy and simple method to prevent overcorrection of myopia. J Korean Ophthalmol Soc 47(2):269-272, 2006 KCI Citation Count: 1