December consultation #6

IOL calculations in eyes that have undergone prior corneal refractive surgery can pose several challenges to the refractive surgeon. Particularly in cases of prior myopic laser vision correction, as seen in this patient, hyperopic refractive surprises can arise after cataract surgery due to underestimations of the final IOL power. Alterations in the keratometric index (ratio between the anterior and posterior corneal surfaces), inaccurate extrapolation of central corneal curvature values from steeper paracentral corneal points by modern-day keratometers and topographers, and erroneous predictions of the effective lens position in eyes with prior myopic corneal refractive surgery are all factors that can contribute to a hyperopic refractive outcome.
Source: Journal of Cataract and Refractive Surgery - Category: Opthalmology Authors: Tags: Consultation Section: Refractive Source Type: research