Galzignato, A.; Galvis, V.; Tello, A.; Urrea, J.F.; Hoffer, K.J.; Coutinho, C.P.; Schiano-Lomoriello, D.; Savini, G. Accuracy of Haigis Formula Using Total Keratometry for IOL Power Calculation in Eyes with Previous Myopic and Hyperopic LASIK and PRK. Photonics2023, 10, 624.
Galzignato, A.; Galvis, V.; Tello, A.; Urrea, J.F.; Hoffer, K.J.; Coutinho, C.P.; Schiano-Lomoriello, D.; Savini, G. Accuracy of Haigis Formula Using Total Keratometry for IOL Power Calculation in Eyes with Previous Myopic and Hyperopic LASIK and PRK. Photonics 2023, 10, 624.
Galzignato, A.; Galvis, V.; Tello, A.; Urrea, J.F.; Hoffer, K.J.; Coutinho, C.P.; Schiano-Lomoriello, D.; Savini, G. Accuracy of Haigis Formula Using Total Keratometry for IOL Power Calculation in Eyes with Previous Myopic and Hyperopic LASIK and PRK. Photonics2023, 10, 624.
Galzignato, A.; Galvis, V.; Tello, A.; Urrea, J.F.; Hoffer, K.J.; Coutinho, C.P.; Schiano-Lomoriello, D.; Savini, G. Accuracy of Haigis Formula Using Total Keratometry for IOL Power Calculation in Eyes with Previous Myopic and Hyperopic LASIK and PRK. Photonics 2023, 10, 624.
Abstract
Background: this retrospective study aimed to analyze the results of the combination of the Haigis formula and Total Keratometry (TK) to calculate the IOL power in eyes with previous corneal refractive surgery. Methods: The TK value provided by the IOL Master 700 (Carl Zeiss Meditec) was introduced into the Haigis formula; the mean prediction error (PE), mean absolute error (MAE), median absolute error (MedAE) and percentage of eyes with a PE within ±0.25 D, ±0.5 D, ±0.75 D and ±1.00 D were calculated. Results: Ninety-three eyes of 93 patients with previous laser refractive surgery were evaluated. Two groups were defined: Group A included 51 previously myopic eyes, Group B included 42 previously hyperopic eyes. The mean PE in Group A was +0.09 ±0.44 D and 76.47% of eyes had a PE within ±0.50 D. In Group B the mean PE was -0.15 ±0.46 D and 66.67% of eyes had a PE within ±0.50 D. Discussion: The Haigis formula combined with TK is one of the most accurate available methods for IOL power calculation in eyes with prior myopic and hyperopic corneal refractive surgery. In such eyes the results are similar to or better than those reported in previous studies.
Keywords
Haigis formula; Total Keratometry; corneal refractive surgery; IOL power calculation; cataract surgery
Subject
Medicine and Pharmacology, Ophthalmology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
