Accuracy of Haigis Formula Using Total Keratometry for IOL Power Calculation in Eyes with Previous Myopic and Hyperopic LASIK and PRK

Background: this retrospective study aimed to analyze the results of combination Haigis formula and total keratometry (TK) in calculating IOL power eyes with previous corneal refractive surgery. Methods: TK value provided by Master 700 (Carl Zeiss Meditec) was introduced into formula; mean prediction error (PE), absolute (MAE), median (MedAE) percentage a PE within ±0.25 D, ±0.5 ±0.75 D ±1.00 were calculated. Results: ninety-three 93 patients laser surgery evaluated. Two groups defined: Myopic Group included 51 previously myopic Hyperopic 42 hyperopic eyes. The +0.09 ± 0.44 76.47% had ±0.50 D. In Group, −0.15 0.46 66.67% Discussion: when compared published other formulas or methods, combined very accurate outcomes for calculation prior such are similar better than those reported studies.