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FEA of Prosthetic Lens Insertion During Cataract Surgery

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Cataract surgery is the most common surgery in America today. Modern surgeries require the opacified crystalline lens to be removed and for a prosthetic lens to be inserted through a suture-less incision during a 5-10 minute outpatient procedure. The industry is driving for smaller incisions by redesigning the lens and insertion device geometry in addition to new materials. Typical lens dimensions are 6mm diameter with a center thickness of 1mm which is inserted through a 2.8mm incision. For the insertion the lens is folded and elongates while advancing down a tapering tube. Abaqus Explicit was chosen for this analysis because of its capability to solve large deformations and difficult self contact. During the insertion the lens can experience strains in excess of 60%. The purpose of this model is to increase our understanding of the mechanical response of existing products to aide in the design of our future products.

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