2Doç. Dr., Abant İzzet Baysal Üniversitesi Tıp Fakültesi, Göz Hastalıkları Anabilim Dalı, Bolu - Türkiye
3Yrd. Doç. Dr., Karabük Üniversitesi Tıp Fakültesi, Göz Hastalıkları Anabilim Dalı, Karabük - Türkiye
4Yrd. Doç. Dr., Gaziosmanpaşa Üniversitesi Tıp Fakültesi, Göz Hastalıkları Anabilim Dalı, Tokat - Türkiye
5Asist. Doç. Dr., Abant İzzet Baysal Üniversitesi Tıp Fakültesi, Göz Hastalıkları Anabilim Dalı, Bolu - Türkiye Purpose: To compare the accuracy of various biometric formulas for predicting postoperative refraction determined using an optical low-coherence refl ectometry device.
Materials and Methods: All eyes were divided into three groups according to axial length; short (<22.0 mm), average (22.0–24.5 mm), and long (>24.5 mm) eyes. The mean error and the mean absolute error values (MAE) were calculated for fi ve various IOL formulas (Haigis, Hoffer Q, SRK/T, Holladay 1, and SRK II) were compared.
Results: The mean absolute errors of 88.7% of the eyes were within 1 D and of 98.3% were within 2 D. MAE values, in short eyes, for Haigis, Hoffer Q, SRK/T, Holladay 1 and SRK II formulas were 0.37±0.28 D, 0.32±0.29 D, 0.42±0.30 D, 0.41±0.25 D and 0.46±0.33 D, respectively. In average eyes MAE values were 0.52±0.47 D, 0.51±0.46 D, 0.53±0.46 D, 0.51±0.45 D and 0.58±0.50 D, respectively. In long eyes MAE values were 0.52±0.47 D, 0.51±0.46 D, 0.53±0.46 D, 0.51±0.45 D and 0.58±0.50 D, respectively.
Conclusion: The Haigis, Hoffer Q, SRK/T and Holladay 1 formulas gave more predictable refractive outcome than SRK II formula in all axial length groups.
Keywords : Biometry, Cataract surgery, Intraocular lens power calculation, Optical low coherence refl ectometry, Refractive outcome