Posterior Chamber Intraocular Lenses (IOL) also known as Sulcus Supported Intraocular lenses (IOL) consist of securing the IOL in the ciliary sulcus and is a replacement for the natural crystalline lens. This type of IOL is most often implanted after a cataract surgery after the removal of the crystalline lens. Accommodating IOLs fall into this category and allow a patient to have optimal vision near, far and in between. This type of IOL is attached to the ciliary muscle and these muscles move the synthetic lens just as if it was the natural crystalline lens allowing for multifocal vision. Monofocal posterior chamber IOLs are also an option. Both monofocal and accommodating IOLs can be made of different materials, from inflexible PMMA to acrylics and silicones.