Posterior capsule opacification
Clouding of the posterior lens capsule following cataract surgery, causing decreased vision.
Full Definition
Posterior capsule opacification (PCO) is the most common late complication of cataract surgery, occurring when residual lens epithelial cells proliferate and migrate onto the posterior capsule, causing visual symptoms similar to recurrent cataracts. PCO can present as fibrotic or pearl-type opacification, depending on the cellular response pattern. The condition typically develops months to years after surgery and can significantly impact visual acuity and contrast sensitivity. Treatment involves YAG laser capsulotomy to create a clear central opening in the opacified capsule, restoring visual function.
Usage
Usage note: Commonly abbreviated as PCO. 'Secondary cataract' is a misnomer but still used colloquially.
In Context
- "The patient developed significant posterior capsule opacification reducing vision to 20/60." — Post-operative complication
- "Dense PCO was successfully treated with YAG laser capsulotomy." — Treatment documentation