Clinical application of accommodating intraocular lens

Abstract

The present review describes recent advances in application of accommodating intraocular lenses (AIOLs). Standard monofocal intraocular lenses (MIOLs) only correct distance vision, while AIOLs are designed to allow both good distance vision and near vision, which is achieved through the contraction and relaxation of ciliary muscles by providing transformation of the axial movement or curvature of the lens. Thus, AIOLs may be a better choice for those patients who demand a higher level of visual performance. Since techniques to analyze the performance of AIOLs have not been standardized, and there is a variety of both subjective and objective methods, it is hard to measure the performance of these intraocular lenses. By evaluating advantages and disadvantages of various AIOLs, and introducing techniques for measurement the performance postoperative, this paper can provide some relative information on choosing the type of AIOLs in the clinic.

Keywords: accommodating intraocular lenses; amplitude of accommodation.

Figure 1. Schematic diagram of 1CU (HumanOptics AG, Erlangen, Germany): a biconvex optic with four wide-based haptics, and haptics are thin in the joint.

Figure 2. Schematic diagram of Tetraflex KH3500 (Lenstec, FL, USA): the optic has square edge, and haptics feature a five-degree anterior angulation are closed loop.

Figure 3. Schematic diagram of Crystalens AT-45 (Bausch and Lomb, NY, USA): the plate haptics are terminating in two T-shaped polyamide loop.

Figure 4. Schematic diagram of Synchrony (Visiogen, Irvine, California, USA): there are two optics connected, the anterior optic is smaller than posterior optic.

Figure 5. Schematic diagram of Sarfarazi (Bausch and Lomb, NY, USA): two elliptical optics have the same diameter, and connected by 3 haptics.

Figure 6. Schematic diagram of deformable surface AIOLs: accommodation occurred during the changing of the lens's surface.