AL-Scan;을 이용한 술 전 안구생체계측과 백내장 수술 후 굴절력 예측의 정확성
Accuracy of Ocular Biometry and Postoperative Refraction in Cataract Patients with AL-Scan;
- 대한안과학회
- 대한안과학회지
- Ophthalmological Society,volume54,number11
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2013.111688 - 1693 (6 pages)
- 4
Purpose: To compare the axial lengths, anterior chamber depths, and keratometric measurements and to predict postoperative refractions of AL-Scan<sup>®, IOL master<sup>®, and ultrasound. Methods: A total of 40 eyes in 30 patients who received cataract surgery were included in the present study. The axial length, anterior chamber depth, and keratometry were measured by 2 types of partial coherence interferometry (AL-Scan<sup>®and IOL master<sup>®) and ultrasound. The SRK/T formula was used to calculate IOL power, and the predictive error which subtracts predictive refraction from postoperative refraction was compared among the ocular biometry devices. Results: Axial lengths were 23.08 ± 0.62 mm, 23.09 ± 0.62 mm, and 22.99 ± 0.62 mm measured by AL scan<sup>®, IOL master<sup>®, and ultrasound, respectively. Axial length measured by ultrasound was statistically significantly shorter than AL scan<sup>® and IOL master<sup>® (p < 0.001, p < 0.001, respectively). The anterior chamber depth and keratometry were 3.11 ± 0.06 mm and 44.82 ± 1.34 D measured by AL scan<sup>®, and 3.13 ± 0.06 mm and 44.85 ± 1.26 D measured by IOL master<sup>®, respectively. The differences of anterior chamber depth and keratometry between the 2 devices were not statistically significant (p = 0.226, p = 0.331, respectively). The mean absolute prediction errors were 0.44 ± 0.35 D, 0.40 ± 0.34 D, and 0.39 ± 0.30 D in AL-Scan<sup>®, IOL master<sup>® and ultrasound, respectively, and were not statistically significantly different (p = 0.843, p = 0.847, p = 1.000, respectively). Conclusions: The ocular biometric measurements and prediction of postoperative refraction using AL-Scan<sup>® were as accurate as IOL master<sup>® and ultrasound. J Korean Ophthalmol Soc 2013;54(11):1688-1693
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