Accommodating intraocular lenses a critical review

Restoration of accommodation in pseudophakic patients is a major goal of modern cataract surgery.So far a variety of devices and surgical techniques have been introduced to solve the problem of presbyopia correction and to provide satisfactory distance and near vision without spectacles after cataract surgery.When the ciliary muscle is relaxed, the lens flattens to enable clear distance vision.When the ciliary muscle contracts, the lens thickens, becoming more curved for added magnification for clear near vision.This is why they are classified as "accommodating IOLs." Both lenses are manufactured and distributed by Bausch Lomb.Accommodation is a process that enables the eye to adjust its focusing power to provide clear vision at all distances.In a young eye, accommodation is essentially instantaneous and effortless.As the eye ages, the lens becomes less flexible, causing the loss of near vision that is the hallmark sign of presbyopia in people over age 40.

The lens and ciliary muscle are connected by a 360-degree series of fibers (called ciliary zonules) that extend from the ciliary muscle to the thin lens capsule (or "bag") that encloses the lens.Another type of presbyopia-correcting IOL that is an alternative to accommodative IOLs is the multifocal IOL category.Like multifocal contact lenses, these premium IOLs have more than one power, with added magnification in certain zones of the lens for improved near vision.Both categories or presbyopia-correcting lenses — accommodating IOLs and multifocal IOLs — have advantages and limitations.

Generally, while both designs expand the range of clear vision compared with conventional monofocal IOLs, accommodating IOLs tend to provide sharper distance vision than multifocal lenses, and multifocal IOLs tend to provide more magnifying power for seeing fine print than accommodating IOLs.

At 3 months postoperatively, the best corrected distance visual acuities (BCDVA), distance-corrected near visual acuities (DCNVA), and subjective and objective accommodations were measured.

Accommodating intraocular lenses a critical review comments

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