Comparison Of Clinical Experiences With A Pure Refractive And A Novel Extended Depth Of Focus Intraocular Lens Based On Wavefront Linking Technology

During the last couple of years, numerous intraocular lenses (IOLs) designed to provide continuous functional vision for far and intermediate distances have entered the market. The IOL manufacturers utilize various optical principles and technologies to meet the ever-increasing demand of patients for visual comfort. The current investigation compares our clinical experiences collected during the first postoperative year after the binocular implantation of two extended-depth-of-focus (EDOF) lenses, the LuxSmart IOL by Bausch + Lomb, and the Elon 877PEY lens by Medicontur.

Department of Ophthalmology, Institute of Aviation Medicine Prague, Czech Republic

Cataract patients without remarkable preoperative corneal astigmatism were included in our investigation. Each of them was binocularly implanted with one of the IOLs in focus. Postoperative visits were scheduled for 1 day, 1, 3, and 6 months and 12 months following surgery. Monocular and binocular visual acuity measurements (uncorrected and distance-corrected) were performed using ETDRS and Jaeger visual acuity charts during each visit. Distance-corrected visual acuity and contrast sensitivity defocus curves were registered using the Multifocal Lens Analyzer application (Qvision, Spain). Patients were asked about the sensation of dysphotopsia. Visual functions and spectacle use were assessed in both study groups.

Both investigated IOLs provided a refractive correction of high accuracy and predictability. Both lenses restored distance vision efficiently, however intermediate and near vision in the Elon group were found to be superior. The binocular visual acuity defocus curves were above 0.2 logMAR along a 2.4 D defocus range with the Elon, and 1.5 D with LuxSmart. Remarkable differences could be observed both in the intermediate and near range (from -1.50 to -3.50 D). All patients were satisfied with the visual outcomes, although LuxSmart patients were more prone to wear spectacles for near-vision tasks and from time to time also for arm-length activities.

Our experiences suggest that both examined intraocular lenses provide predictable refractive outcomes and good distance vision, however, the Elon 877PEY model based on wavefront linking contributes to a wider range of excellent quality vision, than the LuxSmart IOL. ELON patients reported the perception of dysphotopic phenomena will less frequency and intensity and found the performance of their daily tasks less difficult, than those receiving the other lens. Based on our experience and on our patients’ feedback we believe, that while LuxSmart is a good enhanced monofocal lens, the Elon IOL grants a real EDOF vision of high quality.