Post-refractive Surgery IOL Power Calculation, Intraoperative Aberrometry

Abstract

Optical biometry, corneal power measurement, and simple intraocular lens (IOL) power calculations provide accurate intraocular lens power determination in most eyes. However, for eyes with altered corneal power after refractive surgery for the correction of myopia, hyperopia, or astigmatism, traditional IOL power calculations are inaccurate. Patients presenting for cataract surgery today have increasingly undergone previous refractive procedures. The refractive outcomes of cataract surgery are important and patient-centered healthcare is responding with new advancements [1]. Optimal postoperative outcomes with minimal refractive error are especially important for patients who have already made significant investments in refractive surgery to be spectacle-free, with high expectations to remain so after cataract surgery. The demand for accurate refractive outcomes has driven the development of new IOL power calculations and methods for determining IOL power in post-refractive surgery eyes. The development of intraoperative wavefront aberrometry appears to increase the accuracy in post-refractive surgery IOL power determination.