Aphakic contact lenses are used in cases where a patient does not have a natural crystalline lens following cataract surgery. During cataract surgery, an artificial intra-ocular lens (IOL) is often implanted into the eye to enable the patient to see effectively. In some cases it is not possible to use an IOL implant, and the patient therefore requires a contact lens to provide them with the best vision possible.
The Aphakic SiH™ lens is ideally suited to this application. Due to the high prescription required, the aphakic contact lens is typically much thicker than a conventional contact lens. The added thickness would normally reduce the oxygen level at the cornea. However, the Silicone Hydrogel material ensures that sufficient oxygen does get to the cornea, despite the added lens thickness. The comfort of the thicker lens will not be compromised due to the high water content and the flexibility of the Silicone Hydrogel material.