Clinical Outcomes and Patient Satisfaction with the ELON Extended Depth-of-Focus Intraocular Lens: A Prospective
Safa Mohanna1, Fabian Gielen1, Golnar Shojaati1
1Eye Department, Cantonal Hospital Winterthur, Switzerland.
Summary
The ELON extended depth-of-focus intraocular lens (IOL) offers high patient satisfaction and excellent visual performance, comparable or superior to monofocal IOLs. It demonstrates strong refractive predictability with minimal visual disturbances, making it a promising alternative for enhanced functional vision.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Clinical Research
Background:
- Cataract surgery is a common procedure to restore vision.
- Intraocular lenses (IOLs) are implanted to replace the natural lens.
- Extended depth-of-focus (EDOF) IOLs aim to provide a continuous range of vision.
Purpose of the Study:
- To evaluate patient satisfaction, visual performance, and refractive predictability of the ELON extended depth-of-focus (EDOF) intraocular lens (IOL).
- To compare the ELON EDOF IOL with traditional monofocal IOLs in a clinical cohort.
Main Methods:
- An observational cohort study involving 32 patients implanted with the ELON IOL.
- A matched monofocal IOL control group was used for comparison.
- Patient-reported outcomes included visual performance, expectation fulfillment, and overall satisfaction. Secondary outcomes included refractive error, visual acuity, and dysphotopsia.
Main Results:
- ELON IOL recipients reported high visual performance (4.19/5), expectation fulfillment (4.45/5), and satisfaction (4.94/5).
- These scores were equivalent or superior to the monofocal IOL group.
- High refractive predictability (90.6% within ±0.50 D SE) and excellent best-corrected visual acuity (logMAR 0.04) were observed. Halos/glare reported in 9.4% of ELON patients.
Conclusions:
- The ELON EDOF IOL demonstrates excellent patient satisfaction, strong refractive outcomes, and minimal dysphotopsia.
- It offers a promising alternative to monofocal IOLs for patients seeking enhanced functional vision.
- The continuous range of focus provided by the ELON IOL supports its use in cataract surgery.


