Accommodating power

To develop an accommodating intraocular lens (IOL) that changes power with ciliary body action and generates a minimum of 8.0 diopters (D) by manipulation of a flexible material between a sulcus-fixated rigid plate and a ciliary muscle–operated capsular diaphragm.

The feasibility of the concept was tested by a laboratory lens model.

Joshua Ben-nun is the inventor of this intraocular lens and has a proprietary interest in the intraocular lens used in this study.

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To overcome the loss of accommodation after cataract surgery, various strategies have been tried with variable success.

Accommodative IOLs have been designed to restore accommodation.

The UBM demonstrated changes in lens curvature between cyclospasm to cycloplegia of calculated 9.0 to 53.0 D for flexible material with a refractive index of 1.41.

Flexible material is capable of being manipulated when placed between a scleral-fixated rigid plane and the ciliary muscles–operated capsular diaphragm.

Fortunately, cataract is treatable by a surgical procedure in which the natural lens is removed through a small incision.

Once all lens material is removed, an artificial lens, known as an intraocular lens (IOL) is implanted into the eye to lie in the original position of the removed natural lens.

The aim of this systematic review is to help define the extent to which accommodative IOLs improve near vision in comparison with standard monofocal IOLs.

Study characteristics This review looked at four studies that enrolled 229 people (256 eyes) and compared the use of accommodative IOLs to the use of monofocal IOLs in cataract surgery. Key findings The results of the review showed that participants who received accommodative IOLs had improvements in near vision at six months and at 12 months after surgery compared to those who received monofocal IOLs.

The other author does not have a financial or proprietary interest in any material or method mentioned.

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