Intraocular lenses, or IOLs, are implantable lenses that are used to replace the natural lenses of the eyes when they have become damaged.

In a young eye, accommodation is essentially instantaneous and effortless.The natural lens in your eye performs an important part of the focusing for your eye.If the natural lens is removed and a cataract lens implant is not placed, then coke bottle thick glasses would be required to try to make up for the loss of your natural lens.If a lens implant is not used the eye must be brought into focus with either a spectacle lens or contact lens. A spectacle lens will be thick, heavy and restrict the field of vision.A contact lens has to be looked after and taken on and off the eye.