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Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
Published on: September 20, 2024
Intraocular lens power calculation in eyes with keratoconus
Nuria Garzón1, Pedro Arriola-Villalobos, Gema Felipe
1From IOA Madrid Innova Ocular (Garzón, Poyales), Optometry and Vision Department (Garzón, García-Montero), Faculty of Optics and Optometry, Complutense University of Madrid, Unidad de Superficie e Inflamación Ocular (Arriola-Villalobos), Servicio de Oftalmología, Hospital Clinico San Carlos, and Servicio de Oftalmología (Felipe), Hospital Clinico San Carlos, Madrid, Spain.
Abstract:
The purpose was to review and document the methods used to calculate the power of the intraocular lens (IOL) to be implanted in cataract surgery in the specific scenario of eyes with keratoconus. This review included all scientific articles published in English that focused on the parameters and formulas used to calculate the power of the IOL to be implanted in eyes with keratoconus undergoing cataract surgery. There are few publications that show in detail how IOL power is calculated in these particular cases. If the keratometric value used was based on the standard refractive index (1.3375), it resulted in a postoperative refractive error with a tendency to hyperopia. The SRK/T formula yielded the best outcomes. The greater the severity of keratoconus the greater was the deviation of the postoperative refractive status from the target outcome.
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