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Anales de la Facultad de Ciencias Médicas (Asunción)

versión impresa ISSN 1816-8949

Resumen

CARRON, Agustín et al. Accuracy of formulas for Intraocular Lens power calculation in Cataract Surgery. A comparison of 8 formulas. An. Fac. Cienc. Méd. (Asunción) [online]. 2021, vol.54, n.2, pp.25-32. ISSN 1816-8949.  https://doi.org/10.18004/anales/2021.054.02.25.

Introduction:

Cataract surgery aims to reestablish visual function compromised by lens opacification; Intraocular Lens implantation the aim is to achieve the best visual acuity without additional correction. In recent years, new Intraocular Lens calculation formulas have appeared that could be more accurate than traditional formulas.

Objectives:

To compare the accuracy of 8 intraocular lens calculation formulas in the prediction of postoperative refraction with a single optical biometry device in patients undergoing cataract surgery with phacoemulsification technique.

Materials and methods:

Consecutive retrospective case series. Between May 1 2017 and May 1 2018; 100 patients undergo uncomplicated cataract surgery with Intraocular Lens implantation using the phacoemulsification technique. One surgeon did the cases. Optical Biometry was performed using the IOL Master 500 device. Manifest refraction was obtained one month after the surgery.

Results:

PANACEA was the most accurate formula; with an Absolute Refractive Defect of 0,18 D. When Considering only short and long eyes Barrett Universal 2 got the smallest defect. HAIGIS and LADAS performed better in eyes with narrow and deep anterior chamber respectively.

Conclusion:

No differences in Absolute Refractive Defect were found between traditional third-generation formulas and those of recent development. Some formulas performed better when considering certain particular anatomical features. It is important to customize the choice of the formula for each specific case.

Palabras clave : Cataract Extraction; Intraocular Lens implantation; Pseudophakia; Biometry..

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