Posterior capsule opacification (PCO) is quite a common condition that can develop after cataract surgery in up to 20% of patients. It involves thickening of the lens capsule which holds your artificial lens in place. This capsule is located behind the lens and can become opaque due to cells that grow and form a membrane on it. As a consequence, there is less light transmitted to the back of the eye, leading to blurred vision and glare in bright lights.