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논문 기본 정보

자료유형
학술저널
저자정보
윤경철 (전남대학교병원)
저널정보
전남대학교 의과학연구소 전남의대학술지 전남의대학술지 제51권 제2호
발행연도
2015.1
수록면
91 - 96 (6page)

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초록· 키워드

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This retrospective study was performed to compare refractive outcomes measured byconventional methods and by use of the Lenstar biometer and to investigate the factorsaffecting intraocular lens (IOL) power calculation with Lenstar with and withoutIOL-constant optimization. The study included 100 eyes of 86 patients who underwentcataract surgery. Corneal curvature was measured with a manual keratometer (MK),automated keratometer (AK), and the Lenstar biometer, and axial length (AL) wasmeasured by A-scan and Lenstar. Mean numerical error (MNE) and mean absoluteerror (MAE) were compared between AK and MK with A-scan, and Lenstar with andwithout optimization. Factors affecting the accuracy of the IOL power calculation byuse of Lenstar with and without optimization were analyzed. No significant differenceswere observed in the MNE or MAE among the devices. The proportion of MAE within0.5 D was higher for Lenstar with optimization (62.7%) than without optimization(46.2%). The proportion of MAE within 0.5 D was 62% and 58% for MK and AK withA-scan, respectively. Without optimization, the MAE was smaller in eyes with ALs between23 mm and 25 mm (p=0.03), whereas it was smaller at higher corneal powerswhen the IOL constant was optimized (>44 D, p=0.03). The IOL power calculationsshowed no significant differences among the devices, but the results of MAE within0.5 D by use of Lenstar without optimization were worse than those of conventionalmethods. The AL influenced the accuracy of refractive outcomes determined by usingLenstar without optimization, and corneal curvature was shown to affect the accuracyof refractive measurements using Lenstar with optimization.

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