Abstract
ABSTRACT Objective To compare the performance of Sanders-Retzlaff-Kraft/Theoretical, Hoffer Q, Barrett Universal II, Kane, and Hill-radial basis function formulas to calculate intraocular lens power in eyes with normal axial length, in terms of predicting target refraction by using partial coherence interferometry technology. Methods Phacoemulsification and intraocular lens implantation were performed in 135 eyes of 135 patients with an axial length between 22 and 24.5 mm. Axial length, keratometry, and anterior chamber depth were measured by intraocular lens Master 500. Sanders-Retzlaff-Kraft/Theoretical, Hoffer Q, Barrett Universal II, Kane, and Hill-radial basis function formulas were used for intraocular lens power calculations. The difference between the expected postoperative refraction and the mean absolute prediction error was calculated for each eye. Statistical significance was evaluated at the level of p 0.05). Conclusion The study showed the third-generation (Sanders-Retzlaff-Kraft/Theoretical and Hoffer Q), fourth-generation (Barrett Universal II) and new-generation (Kane and Hill-radial basis function) intraocular lens power calculation formulas had similar performances regarding calculation of intraocular lens power to predict target refraction after phacoemulsification in eyes with normal axial length.
Highlights
Cataract surgery is one of the most common and successful surgical interventions in modern medicine.[1]. Every year, intraocular lenses (IOLs) are implanted in millions of eyes worldwide.[2]. One of the most important factors affecting the success of this surgical procedure is the implantation of an IOL of appropriate power.[3]. The precision of clinical measurements and the accuracy of IOL calculations have become essential factors to achieve satisfactory refractive results after surgery
This study aimed to compare the success of five different IOLs power calculation formulas – SandersRetzlaff-Kraft/Theoretical (SRK/T), Hoffer Q, Barrett Universal II, Kane, and Hill-radial basis function (RBF)
There was no difference between the five biometric formulas in obtaining the planned refractive values (p>0.05)
Summary
Cataract surgery is one of the most common and successful surgical interventions in modern medicine.[1] Every year, intraocular lenses (IOLs) are implanted in millions of eyes worldwide.[2] One of the most important factors affecting the success of this surgical procedure is the implantation of an IOL of appropriate power.[3] The precision of clinical measurements and the accuracy of IOL calculations have become essential factors to achieve satisfactory refractive results after surgery. [4] Obtaining the target refractive result has become an integral part of cataract surgery.[5] with the advances in optical biometry and the introduction of new-generation IOL calculation formulas, the refractive outcomes of cataract surgery can be more accurately predicted.[6,7]. This study aimed to compare the success of five different IOLs power calculation formulas – SandersRetzlaff-Kraft/Theoretical (SRK/T), Hoffer Q, Barrett Universal II, Kane, and Hill-radial basis function (RBF). To evaluate the prediction accuracy differences of Kane formula, as compared to the other four formulas in obtaining the planned refractive value before cataract surgery
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