Accommodating intraocular lenses for patients with cataract a review

17 Nov

Toric IOLs are premium intraocular lenses that correct astigmatism as well as nearsightedness or farsightedness.

Like toric soft contact lenses, toric IOLs can correct astigmatism because they have different powers in different meridians of the lens.

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FDA-approved toric intraocular lenses available in the U. include: Tecnis Toric (Abbott Medical Optics), Acry Sof IQ Toric (Alcon), and Trulign Toric (Bausch Lomb).Accommodating IOLs are premium intraocular lenses that expand the range of clear vision with both an aspheric design and flexible "haptics" — the supporting legs that hold the IOL in place inside the eye.These flexible legs allow the accommodating IOL to move forward slightly when you look at near objects, which increases the focusing power of the eye enough to provide better near vision than a conventional monofocal lens.Conventional spherical IOLs are monofocal lenses, meaning they are designed to provide clear vision at a single focal point (usually far away for good driving vision, for example).With conventional IOLs, typically you must wear eyeglasses or contact lenses in order to use a computer, read or perform other close-up tasks within arm's length.In LRI, small incisions are made at opposite ends of the cornea, very near the junction between the cornea and the surrounding white sclera.(This junction is called the limbus.) When these incisions heal, the cornea becomes more spherical in shape, reducing or eliminating astigmatism.Your cataract surgeon can help you decide if you are a good candidate for multifocal IOLs at your preoperative exam and consultation.Laser cataract surgery often is recommended if you are interested in multifocal IOLs, because precise alignment of these lenses is very important to give you the best visual outcome at all distances.Then, when the toric IOL is implanted during the cataract procedure, the surgeon rotates the IOL so the markings on the IOL are aligned with the markings on the cornea to insure proper astigmatism correction.Prior to the development of toric IOLs, cataract surgeons had to perform a procedure call limbal relaxing incisions (LRI) to correct astigmatism during or after cataract surgery.