Intraocular Lens Power Calculation in Eyes with Previous Excimer Laser Surgery for Myopia

PurposeTo review the literature to evaluate outcomes of intraocular lens (IOL) power calculation in eyes with a history myopic LASIK or photorefractive keratectomy (PRK).MethodsLiterature searches were conducted PubMed database January 2020. Separate relevant cataract surgery and corneal refractive returned 1169 162 citations, respectively, full text 24 was reviewed. Eleven studies met inclusion criteria for this assessment; all assigned level III rating evidence by panel methodologist.ResultsWhen automated keratometry used theoretical formula designed without previous laser vision correction, mean prediction error (MPE) universally positive (hyperopic), absolute errors (MAEs) median (MedAEs) relatively high (0.72–1.9 diopters [D] 0.65–1.73 D, respectively), low (8%–40%) proportion within 0.5 D target spherical equivalent (SE). Formulas developed specifically population requiring both prerefractive manifest refraction (i.e., clinical history, bypass, Feiz-Mannis) produced SE between 26% 44%. only preoperative no at had lower MAEs (0.42–0.94 D) MedAEs (0.30–0.81 higher (30%–68%) proportions SE. Strategies that averaged several methods yielded lowest reported (0.31–0.35 highest (66%–68%) Even after using best-known methods, less accurate excimer myopia compared those did not have it.ConclusionsCalculation are longer considered gold standard. Refractive than not. Patients should be advised limitation when considering setting surgery. Conclusions limited small sample sizes retrospective nature nearly existing domain. To (PRK). Literature methodologist. When it. Calculation