The Alcon Vivity® Intraocular Lens (IOL) is the first non-diffractive extended depth of focus (EDOF) IOL available in the United States. The definition of diffraction is “the spreading of waves around obstacles.” Vivity proprietary non-diffractive technology uses two smooth surface transition elements on the anterior surface of the IOL that work simultaneously to create continuous, extended vision rather than separate focal points.
The first extended depth of focus, multifocal, and trifocal IOLs used diffractive technology to achieve their range of vision. Concentric rings within the central portion of the IOL allow the patient to have multiple focal points. The Vivity IOL differs in that it stretches the light for an extended depth of focus from distance to mid-range, rather than splitting the light to give focal points at a distance, mid-range, and near.
Non-diffractive technology decreases the incidence of visual disturbances, such as starbursts and halos, compared to multifocal IOLs. This technology also allows patients with mild corneal pathology such as prior LASIK or PRK, guttata from Fuchs dystrophy, or dry eyes, to experience the benefit of an extended depth of focus IOL. Patients with mild macular disease, such as drusen or epiretinal membranes, also often do well with the Vivity IOL.
I still recommend a single vision lens for those with moderate to severe ocular pathology, such as multiple LASIK procedures, macular degeneration, severe dry eyes, etc.
In my experience, the Alcon Vivity Extended Depth of Focus intraocular lens is ideal for patients with mild corneal or macular disease looking to have good distance to mid-range vision but do not mind wearing reading glasses. The Vivity also excels in patients who prefer to have an extended depth of focus from distance to mid-range with decreased risk of starbursts or halos, but again are not bothered by having to use reading glasses. The Vivity also has a toric model that reduces astigmatism.
About Ken Kreidl, MD
Dr. Kreidl started his ophthalmology practice at Boulder Medical Center in 2004. He provides the full range of services, including:
- Cataract Surgery – Acrysof PanOptix® Trifocal Intraocular Lens (IOL), Symfony Extended Vision Lens, and Crystalens and Trulign accommodative lenses
- Glaucoma – SLT, ALT, LPI
- Diabetes – Retinal Laser Surgery
- Dry Eyes Diagnosis and Therapies
- Eyelid Surgery
- Eye Trauma
- Complete Eye Exams
- Contact Lenses