Distance And Enhanced Intermediate Visual Outcomes Following The Implantation Of A Monofocal Intraocular Lens In Cataract Patients – A Retrospective, 12-Month Follow-Up Study

The increased pressure on intermediate vision in everyday lifestyle these days elevates patient expectations regarding cataract surgery outcomes. This need was addressed by a new generation of monofocal intraocular lenses (IOLs), called enhanced monofocal IOLs (mono‑EDoF), that is able to improve the intermediate vision of patients.

Our clinical experience and patient feedback on the monofocal Bi-Flex 877PA POB-MA IOL by Medicontur indicate not only superior distance visual acuity but also improved intermediate vision, which raises the question of whether the lens meets the standard criteria of mono-EDoF lenses.

Focusing on visual acuity measurements, the current investigation aims to evaluate the visual outcomes of the 877PA lens.

Department of Ophthalmology, Petz Aladár County Teaching Hospital, Hungary

Conducted as a 12-month retrospective investigation, clinical data from cataract patients who underwent binocular implantation of the 877PA lens between 2022 and 2023 was collected and analyzed.

Postoperative monocular and binocular distance-corrected visual acuity defocus curves (VADC) under photopic conditions were obtained from 1.5 D to -3.0 D utilizing the Multifocal Lens Analyzer (MLA) application (Qvision, Spain). Additionally, preoperative and postoperative corrected and uncorrected binocular visual acuities were measured using ETDRS charts.

Based on our initial findings, the monofocal 877PA IOL was shown to be efficient in restoring distance vision, as well as providing functional intermediate vision. Binocular visual acuity of 0.2 logMAR or better was maintained along a 1.75 D defocus range, while the mean visual acuity in the intermediate range (-1.5 D) was 0.1 logMAR.

As patients’ desire for spectacle-independence grows, particularly for activities requiring good intermediate vision (e.g., using smartphones and computers), the demand for IOLs providing not only excellent distance but also enhanced intermediate visual acuity keeps increasing, highlighting a demand for new solutions.

The 877PA IOL has demonstrated excellent distance vision along with functional intermediate vision, exceeding current expectations for monofocal lenses. Based on the results, we believe that the 877PA IOL, initially marketed as a monofocal IOL, could offer a visual experience beyond conventional expectations, and therefore could potentially be classified as a mono-EDoF lens.