The lens of your eye is held in a thin clear lining called a capsule. During cataract surgery the natural lens is removed from the capsule and replaced with a clear plastic lens. Over time, in some patients, the capsule behind the lens can thicken. This can stop light passing through to the light-sensitive membrane at the back of your eye.

Typical symptoms are sensitivity to bright lights (glare) and blurred vision.

YAG laser capsulotomy is a type of gentle laser treatment that is used to make a hole in the capsule to allow light to pass through to the back of the eye and help you see better. The treatment is routinely done as an outpatient procedure, typically lasts five minutes, involves no surgical cuts and is completely painless.