백내장 수술 시 3가지 각막 곡률 검사기의 비교

• 영문명: Comparison of 3 Keratometers in Cataract Surgery
• 발행기관: 대한검안학회
• 저자명: 황웅주(Woong-Joo Whang) 주천기(Choun-Ki Joo)
• 간행물 정보: 『Annals of optometry and contact lens』Vol.11 No.1, 78~83쪽, 전체 6쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2012.06.30

국문 초록

목적: 수동 각막 곡률 검사기와 IOLMaster 자동 각막 곡률 검사기, Pentacam을 통해 측정된 각막 곡률값을 비교하고, 백내장 수술 시에 효용성이 있는 기구를 찾고자 하였다. 대상과 방법: 백내장 수술을 시행한 71안(71명)을 대상으로, 술 전 수동 각막 곡률 검사기와 IOLMaster, Pentacam (true net power)을 통해 각막 곡률을 측정하고, 비교하였다. 술 후 3개월에 굴절값을 측정하여, 예측 오차와 예측 오차의 절대값을 비교하였다. 안축장의 길이 측정에는 IOLMaster를 이용하였으며, 예측값 계산에는 A-상수를 후향적으로 보정한 SRK-T공식을 사용하였다. 결과: 수동 각막 곡률 검사기와 IOLMaster, Pentacam true net power상의 각막 곡률은 43.93±1.39, 44.02±1.40, 42.93±1.43D였다. 예측 오차는 0.000±0.53, 0.000±0.51D, 0.000±0.57D였으며, 예측 오차의 절대값은 0.43±0.31, 0.42±0.29, 0.47±0.33D였다. 결론: IOLMaster 자동 각막 곡률 검사기를 통해 측정한 각막 곡률이 백내장 수술 시 상대적으로 유용했다.

영문 초록

Purpose: To compare keratometric values obtained with a manual keratometer, the IOLMaster automated keratometer (Carl Zeiss), and the Pentacam rotating Scheimpflug camera (Oculus) in cataract surgery, and to characterize the refractive outcomes generated using each device. Methods: In this retrospective study, 71 eyes of 71 patients were analyzed. The keratometric values obtained with different devices (manual keratometer, the IOLMaster automated keratometer and Pentacam scheimpflug camera) were employed for IOL power calculation. Axial length was measured by the IOLMaster partial coherence interferometry. The predicted refraction was evaluated using the SRK-T formula and optimization was conducted. Multiple comparisons of averaged corneal powers were conducted and the averaged corneal power was used to calculate the predicted refraction. The absolute values of corneal astigmatism were calculated using the corneal powers for the flat and steep meridians ([Ks-Kf]), and those were also compared. After cataract surgery, mean errors and mean absolute errors were compared. Results: The mean keratometric values generated by manual keratometer, the IOLMaster automated keratometer, and the Pentacam Scheimpflug system (true net power) were 43.93±1.39, 44.02±1.40 and 42.93±1.43 diopter. The standard deviation of the mean errors from manual keratometer, IOLMaster optical biometer and Pentacam Scheimpflug system were 0.53D, 0.51D and 0.57D. The mean absolute values from manual keratometer, IOLMaster optical biometer and the Pentacam Scheimpflug system were 0.43±0.31, 0.42±0.29 and 0.47±0.33 diopter. Conclusions: Corneal power measurements with the IOLMaster optical biometer are a good choice for application to cataract surgery.

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참고문헌

키워드

Biometry Cataract extraction Keratometry