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목적 : To investigate the relationships between corneal asphericity and Haigis-L formula prediction errors in routine cataract surgery after refractive surgery for myopic correction.
방법 : This study included 80 patients (80 eyes) with a history of previous PRK or LASIK and cataract surgery. Axial length, anterior chamber depth, and central corneal power were measured using the optical biometer. Corneal spherical aberrations at 6.0 and 8.0 mm were measured using a rotating Scheimpflug camera. The postoperative refractive outcome at 6 months, mean error, and mean absolute error were determined. Correlation tests were performed to determine the relationships between preoperative biometric data and the mean error.
결과 : The mean error and mean absolute error were - 0.05 ± 0.68 and 0.55 ± 0.38 D, respectively. The refraction prediction percentages within ± 0.50, ± 1.00, and ± 1.50 D were 47.5%, 85.0%, and 97.5%, respectively. The Q value at 6.0 mm and the spherical aberrations at 6.0 and 8.0 mm showed positive correlations with the mean error (r = 0.250, 0.258, and 0.750; p = 0.025, 0.020, and 0.000, respectively).
결론 : Corneal asphericity influences the predictive accuracy of residual refractive error of the Haigis-L formula; the accuracy may be enhanced by taking into consideration the preoperative corneal spherical aberration, especially for large corneal diameters.
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