Intraocular Lens Power Calculation After Previous Myopic Laser Vision Correction Based on Corneal Power Measured by Fourier-domain Optical Coherence Tomography

Overview

Journal J Cataract Refract Surg

Specialty Ophthalmology

Date 2012 Mar 24

PMID 22440433

Citations 22

Authors

Maolong Tang

Li Wang

Douglas D Koch

Yan Li

David Huang

Affiliations

Soon will be listed here.

Abstract

Purpose: To use Fourier-domain optical coherence tomography (OCT) to measure corneal power and calculate intraocular lens (IOL) power in cataract surgeries after laser vision correction.

Setting: Doheny Eye Institute, Los Angeles, California, and Cullen Eye Institute, Houston, Texas, USA.

Design: Prospective comparative case series.

Methods: Patients with previous myopic laser vision correction who had monofocal IOL implantation were enrolled. A Fourier-domain OCT system was used to measure corneal power and pachymetry. Axial length and anterior chamber depth were measured with partial coherence biometry. An OCT-based IOL formula was developed, and the mean absolution error (MAE) of postoperative refraction was compared with that for the Haigis-L formula. At Doheny, corneal power was also measured using the clinical history method, the contact lens overrefraction method, and slit-scanning tomography total optical power.

Results: Sixteen eyes of 16 patients were enrolled at the 2 sites. Previous laser vision correction ranged from -9.81 to -0.88 diopter (D). The MAE was 0.50 D for OCT-based IOL calculation and 0.76 D for the Haigis-L formula (P=.14). In the 6 eyes enrolled at Doheny, the MAE of OCT-based IOL calculation was 0.60 D. In comparison, the contact lens overrefraction (MAE = 1.46 D, P<.05) and clinical history (MAE = 1.78 D, P<.05) methods were worse. Slit-scanning tomography gave an MAE of 1.28 D (P>.05).

Conclusion: The predictive accuracy of OCT-based IOL power calculation was equal to or better than current standards in post-laser vision correction eyes.

Citing Articles

Comparison of intraocular lens power prediction by American Society of Cataract and Refractive Surgery formulas and Barrett True-K TK in eyes with prior laser refractive surgery.

Shetty N, Sathe P, Aishwarya , Francis M, Shetty R Indian J Ophthalmol. 2024; 72(8):1210-1213.

PMID: 39078967 PMC: 11451800. DOI: 10.4103/IJO.IJO_2758_23.

Theoretical Accuracy of the Raytracing Method for Intraocular Calculation of Lens Power in Myopic Eyes after Small Incision Extraction of the Lenticule.

Wei Y, Liu Y, Li H, Song H Klin Monbl Augenheilkd. 2023; 241(2):221-229.

PMID: 37722612 PMC: 10898958. DOI: 10.1055/a-2177-4998.

Comparison of intraocular lens power prediction accuracy of formulas in American Society of Cataract and Refractive Surgery post-refractive surgery calculator in eyes with prior radial keratotomy.

Shetty N, Sathe P, Aishwarya , Francis M, Shetty R Indian J Ophthalmol. 2023; 71(9):3224-3228.

PMID: 37602612 PMC: 10565947. DOI: 10.4103/IJO.IJO_3417_22.

Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes.

Wang L, Koch D Taiwan J Ophthalmol. 2022; 12(1):22-31.

PMID: 35399961 PMC: 8988985. DOI: 10.4103/tjo.tjo_38_21.

Factors affecting prediction error after cataract surgery with implantation of various multifocal IOLs in patients with previous refractive laser surgery.

Yoo Y, Kang M, Park J, Kwon H, Chung E, Lim D Ann Transl Med. 2022; 9(23):1720.

PMID: 35071414 PMC: 8743713. DOI: 10.21037/atm-21-3057.

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