An update on intraocular lens power calculations in eyes with previous laser refractive surgery

Abstract

Purpose of review There is an ever-growing body of research regarding intraocular lens (IOL) power calculations following photorefractive keratectomy (PRK), laser-assisted in-situ keratomileusis (LASIK), and small-incision lenticule extraction (SMILE). This review intends to summarize recent data and offer updated recommendations. Recent findings Postmyopic LASIK/PRK eyes have the best refractive outcomes when multiple methods are averaged, or when Barrett True-K is used. Posthyperopic LASIK/PRK eyes also seem to do best when Barrett True-K is used, but with more variable results. With both aforementioned methods, using measured total corneal power incrementally improves results. For post-SMILE eyes, the first nontheoretical data favors raytracing. Summary Refractive outcomes after cataract surgery in eyes with prior laser refractive surgery are less accurate and more variable compared to virgin eyes. Surgeons may simplify their approach to IOL power calculations in postmyopic and posthyperopic LASIK/PRK by using Barrett True-K, and employing measured total corneal power when available. For post-SMILE eyes, ray tracing seems to work well, but lack of accessibility may hamper its adoption.

Application of sentiment and word frequency analysis of physician review sites to evaluate refractive surgery care

“…Common surgical procedures in refractive surgery include small incision lenticule extraction (SMILE), photorefractive keratectomy, and the EVO Implantable Collamer Lens. 14 The most common corneal procedure performed by refractive surgery ophthalmologists is laser assisted in-situ keratomileusis (LASIK), and the most common lens based refractive surgery remains cataract surgery. 15 Refractive surgery is expected to increase in frequency as the world population's myopia epidemic grows.…”