Accommodating IOLs One approach, accommodating IOLs, tackle the problem differently.Instead of placing multiple focusing elements in a single fixed lens, most accommodating lenses change focus by utilizing a single optical element that moves like a camera lens or alters shape.
Both multifocal and accommodating lenses provide an added benefit to the cataract and refractive patients, offering them the potential independence from reading glasses. The revolutionary design element that makes crystalens the state-of-the-art replacement lens are “hinges” which are designed to allow the lens to move, or accommodate to focus on objects near, far and all distances in-between seamlessly. Crystalens, is a cataract replacement lens that works naturally with your eyes’ muscles to give you the quality of vision you enjoyed when you were younger.Doctors were also advised to aim for a post-operative spectacle power of -0.75 in one eye with this lens-which essentially is monovision and could be obtained with a conventional monofocal lens at much reduced cost. Due to their flexible haptics, compared the Crystalens, the Tetraflex (another, non FDA approved 'accommodating' lens) and the conventional monofocal Tecnis single piece non-accommodating lens, and found no extra advantage of these 'accommodating' lenses over the non-accommodating lens, for near vision.The other 'accommodating' lens that was under development, and was even bought over by a large ophthalmic surgical product manufacturer for hundreds of millions of dollars, was the ' Synchrony'.This did accommodate to a greater extent than the Crystalens, but for technical reasons never saw the light of day.
So in short, for cataract patients who don't like reading glasses after surgery, don't bother with 'accommodating' lenses.
Today, approximately 14 percent of cataract patients receive one of three types of premium IOLs: accommodating, multifocal, or toric; a fourth type of premium IOL is the phakic IOL.
(Although there is considerable controversy in the ophthalmic community about the term , this article uses the nomenclature from the workshop.) The FDA has received an increasing number of requests for review of additional entries, but the process for review is a cumbersome one. Chang, MD, at the University of California, San Francisco.
It is the first and only FDA-approved accommodating intraocular lens Crystalens® has effectiveness proven in clinical trials.
The majority of all patients implanted with Crystalens® IOLs could see better at all distances compared to patients implanted with a monofocal IOL.
Food and Drug Administration (FDA) explored these questions and more in a first-ever collaborative workshop held this spring.