Akademik Veri Yönetim Sistemi
JOURNAL OF ISTANBUL FACULTY OF MEDICINE-ISTANBUL TIP FAKULTESI DERGISI, cilt.0, 2023 (ESCI)
Objective: Comparison of the accuracy of six biometric formulas based on refractive findings using patients' biometric and
refractive data before phacoemulsification surgery.
Material and Method: A retrospective analysis was conducted
of the data of 65 eyes of 43 patients who underwent phacoemulsification at the Ophthalmology Department of Istanbul University Istanbul Faculty of Medicine between January 2016 and July
2019. The intraocular lens (IOL) power corresponding to the target refraction value in patients was calculated using the SRK/T
formula. The patients' final refraction values were obtained by
examinations conducted after the third postoperative month.
After implanting IOLs with the same refractive power, target refraction values were calculated using the optical biometry measurements of the patients and the Hoffer Q, T2, Ladas Super Formula (Ladas), Barrett Universal II (BU II), and Hill-RBF formulas.
The refractive refraction deviation values between the formulas
were compared, as well as the difference between the target
refraction values determined by the formulas and the spherical
equivalents of the patients' result refractions.
Result: The normal age of the 43 patients in the study was
64.65±8.23 (47-86) years. The mean axial length was 23.5±0.7mm
(22.01-24.5). The refractive deviation was 0.29±0.29 D with SRK/T,
0.27±0.27 D with T2, 0.3±0.24 D with Hoffer Q, 0.3±0.26 D with
Ladas, and 0.33±0.28 D with BU II, and 0.27±0.29 D with HillRBF. The refractive deviation percentages of the formulas in the
range of -1.00 D to +1.00 D were as follows: 98.5% Hoffer Q and
Hill-RBF; 96.9% T2, Ladas, BU II, and SRK/T. In terms of refractive
deviation values, there was no statistically significant difference
between the formulas (p>0.05).