한국 정상안 및 백내장안에서의 스트레이라이트의 연구
Straylight in Normal and Cataractous Eyes of Koreans
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목적: 매체 혼탁으로 인한 빛의 분산을 측정하는 유일한 기구인 C-quant 스트레이라이트기(Oculus GmbH, Wetzlar, Germany)로 정상 안, 수정체 혼탁 위치, 초기 백내장에서 주관적 증상의 유무, 초기백내장 수술 전후의 스트레이라이트값을 비교하고자 하였다. 대상과 방법: 정상안 217안과 백내장안 138안을 후낭하 혼탁, 전낭하 혼탁, 핵혼탁, 초기 백내장으로 분류하고 초기 백내장의 주관적 증상의 유무, 수술 전후의 스트레이라이트값을 측정하였다. 결과: 정상안, 백내장안의 스트레이라이트값은 각각 1.34, 2.46이었으며 후낭하 혼탁은 2.81로 전낭하 혼탁 2.33, 핵혼탁 1.99에 비해 유의하게 높았다. 초기 백내장 중 주관적 증상을 호소한 군 2.02, 않은 군 1.56으로 호소한 군이 유의하게 높았으며 수술 후 1.42로 감소하였다. 결론: 후낭 백내장에서 스트레이라이트가 가장 높아 빛의 분산이 가장 많았다. 초기 백내장 중 주관적 증상을 호소하는 경우 빛의 분산 이 더 많았으며 수술 후 빛의 분산은 감소하였다. 빛의 분산을 측정하는 C-quant 스트레이라이트기는 백내장 수술 시기 결정 및 시력 의 질 측정에 유용할 것이다.
Abstract
Purpose: To compare intraocular straylight in normal and cataractous eyes as the morphology and to compare straylight as the result of subjective symptoms in early cataract cases using the C-quant straylight meter, the only tool to measure light scattering in media. Methods: Straylight values were measured in 217 normal eyes and 138 cataractous eyes. Cataractous eyes were classified into posterior subcapsular opacity, anterior subcapsular opacity and nucleosclerosis. Straylight values of each group were measured. The 56 early cataractous eyes were categorized into two groups, depending on the presence of subjective symptoms, and each straylight value was measured. The preoperative and postoperative straylight values of early cataracts were also compared. Results: The mean straylight values of normal and cataractous eyes were 1.34 and 2.46, respectively. The value of posterior subcapsular opacity (2.81) was significantly higher than that of anterior subcapsular opacity (2.33) and nucleosclerosis (1.99). The straylight values of early cataracts were significantly higher in the group with subjective symptoms (2.02) than in the group without subjective symptoms (1.56). The postoperative straylight value decreased to 1.42. Conclusions: The posterior subcapsular cataract showed significantly high intraocular straylight, indicating that light scattering occurred to a greater extent in this group. Light scattering occurred more in early cataractous eyes with subjective symptoms than in eyes without symptoms, and light scattering was reduced after surgery. The C-quant straylight meter, which measures the light scattering in media, can be a useful tool to determine the time of cataract surgery and to evaluate the quality of vision.
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