Reliable ray tracing for calculating IOL power

Article

Ray tracing with patient-customized eye models is effective in calculating IOL power, claims a recent case series study.

Using ray tracing with patient-customized eye models is an effective procedure in calculating IOL power, claims a case series study in the Journal of Cataract and Refractive Surgery.

Dr Carmen Canovas et al., Hospital Universitario Virgen de la Arrixaca, Murcia, Spain, calculated optimum IOL power using ray tracing with a patient-customized eye model in those requiring cataract surgery. There were 18 non-LASIK patients and 10 LASIK patients included in the study. The results for IOL power predictions were compared with the optimum postoperative IOL power.

The standard approach to IOL calculation and the ray-tracing technique gave similar mean absolute residual error and variance in non-LASIK patients. In all LASIK patients the ray-tracing procedure was the most accurate.

Differences between the prediction of IOL power with corneal aberrations and without was linked to the amount of corneal spherical aberration. In some cases this resulted in a difference of up to 3.00 D in IOL power.

Ray tracing using patient-customized eye models was found to be a strongly successful tool for IOL power calculation. But corneal aberrations must be incorporated in post-LASIK eyes due to increased corneal spherical aberration.

The full abstract can be found in the Journal of Cataract and Refractive Surgery, click here

Related Videos
ARVO 2024: Andrew D. Pucker, OD, PhD on measuring meibomian gland morphology with increased accuracy
 Allen Ho, MD, presented a paper on the 12 month results of a mutation agnostic optogenetic programme for patients with severe vision loss from retinitis pigmentosa
Noel Brennan, MScOptom, PhD, a clinical research fellow at Johnson and Johnson
ARVO 2024: President-elect SriniVas Sadda, MD, speaks with David Hutton of Ophthalmology Times
Elias Kahan, MD, a clinical research fellow and incoming PGY1 resident at NYU
Neda Gioia, OD, sat down to discuss a poster from this year's ARVO meeting held in Seattle, Washington
Eric Donnenfeld, MD, a corneal, cataract and refractive surgeon at Ophthalmic Consultants of Connecticut, discusses his ARVO presentation with Ophthalmology Times
John D Sheppard, MD, MSc, FACs, speaks with David Hutton of Ophthalmology Times
Paul Kayne, PhD, on assessing melanocortin receptors in the ocular space
Osamah Saeedi, MD, MS, at ARVO 2024
© 2024 MJH Life Sciences

All rights reserved.