It is not possible for a film behind the intraocular lens
implanted in the eye after cataract surgery
to move in front of the lens. If her vision was fine immediately after surgery in Sept2012 and has now begun to get cloudy in Feb 2013, the commonest cause of this is what is called a Posterior Capsular Opacification or PCO. Here, a collection of 'debris' is noted on the posterior surface of the intraocular lens that develops after some time. This has to be removed by a laser
assisted outpatient procedure called YAG laser capsulotomy
. If the retina
and the rest of the eye is fine, which is usually the case if vision was normal after surgery, the patient gains clear vision once more and this procedure does not have to be repeated in her lifetime.