Article

Correcting corneal coma with an IOL

A newly designed IOL corrects corneal coma and is tolerant of largedegrees of ocular misalignment.

A newly designed IOL corrects corneal coma and is tolerant of large degrees of ocular misalignment.

"Corneal coma is compensated for by the eye, but that ability can be disrupted by LASIK and cataract surgery - the latter of which modifies the internal optics of the eye," said Juan Tabernero, MD, of the University of Murcia, Murcia, Spain.

Dr. Tabernero and colleagues designed an IOL using a previously developed computer model to predict the optical performance of individual eyes after IOL implantation from actual data and lens design parameters. The investigators studied the relationship between ocular alignment and aberrations, Dr. Tabernero said. They measured angle kappa, lens tilt, and decentration using a new instrument based on recording of Purkinje images. They compared the optical results predicted by the model using conventional IOLs and the newly designed IOL that corrects coma.

Dr. Tabernero reported that when a conventional IOL was compared with the new IOL in a simulation, the new IOL compensated for the coma generated in the model, but the conventional IOL did not. The new IOL stabilized the visual quality, while the visual quality deteriorated with the conventional IOL.

"In conditions of perfect alignment, the performance of the IOL is quite promising," he stated. "However, IOL misalignments could be a problem and must be considered."

When they measured 21 pseudophakic eyes, the average decentration was about 0.3 mm and the average IOL tilt with respect to the line of sight was about 6 degrees. The conventional IOL still generated coma, but the new IOL nearly suppressed the coma.

"This new IOL, designed to correct coma, provides superior optical quality," Dr. Tabernero said. "The IOL is useful in a full range of conventional physiological powers, but the highest benefit is seen in the lower powers, ranging from 10 to 15 D. The new IOL was tested with real corneas with alignment data and the correction of coma was stable in a range of misalignments."

Newsletter

Don’t miss out—get Ophthalmology Times updates on the latest clinical advancements and expert interviews, straight to your inbox.

Related Videos
Patricia Buehler, MD, MPH, founder and CEO of Osheru, talks about the Ziplyft device for noninvasive blepharoplasty at the 2025 American Society of Cataract and Refractive Surgeons (ASCRS) annual meeting
(Image credit: Ophthalmology Times) ASCRS 2025: Bonnie An Henderson, MD, on leveraging artificial intelligence in cataract refractive surgery
(Image credit: Ophthalmology Times) ASCRS 2025: Gregory Moloney, FRANZO, FRCSC, on rotational stability
Sheng Lim, MD, FRCOphth, discusses the CONCEPT study, which compared standalone cataract surgery to cataract surgery with ECP, at the 2025 ASCRS Annual Meeting.
(Image credit: Ophthalmology Times) ASCRS 2025: Steven J. Dell, MD, reports 24-month outcomes for shape-changing IOL
Alex Hacopian, MD, discusses a presbyopia-correcting IOL at the 2025 American Society of Cataract and Refractive Surgeons (ASCRS) annual meeting
(Image credit: Ophthalmology Times) ASCRS 2025: Parag Majmudar, MD, on bridging the gap between residency and real-world practice
Brett Bielory, MD, discusses his poster at the ASCRS annual meeting, which focuses on an under-diagnosed corneal pathology: neurotrophic keratitis.
(Image credit: Ophthalmology Times) Oluwatosin U. Smith talks Glaukomtecken
ASCRS 2025: Eva Kim, MD, discusses implantable collamer lenses and high myopia.
© 2025 MJH Life Sciences

All rights reserved.