The posterior capsule is the delicate membrane that is preserved during cataract surgery and supports the new lens implant. It is common for this membrane to opacify at some stage after cataract surgery. When this happens you may feel as if the cataract has reappeared as the vision deteriorates.
PCO is treated by applying a laser to the opacified capsule. An opening is created in the capsule to allow the normal passage of light through into the eye. The picture illustrates a patient treated by Mr. Patel - note the circular opening without a single pit in the lens - exceptional surgical accuracy!