IOL power calculations after LASIK or PRK: Barrett True-K biometer-only calculation strategy yields equivalent outcomes as a multiple formula approach

To compare the accuracy of intraocular lens (IOL) power calculations performed using the biometer-embedded Barrett True-K formula vs a multiple formula approach using the ASCRS postrefractive calculator in eyes with previous myopic or hyperopic refractive surgery.Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio.Retrospective, consecutive case series.Patients who underwent cataract surgery with a history of corneal refractive surgery were...