Treatment
YAG laser capsulotomy
Clinically reviewed · Last reviewed 2026-06-13
What it is
After cataract surgery the thin membrane (capsule) holding the new lens can gradually turn cloudy, called posterior capsule opacification. This is common and is not the cataract coming back. A YAG laser makes a small opening in this membrane to restore clear vision.
What happens on the day
The treatment is done in a clinic, not an operating theatre, while you sit at a machine.
- Drops to widen the pupil and numb the eye
- A lens rested gently on the eye to focus the laser
- A few minutes of painless laser to open the cloudy membrane
- No cuts, stitches or eye patch needed
Recovery
You may see extra floaters and have slightly blurred vision for a few hours, and bright light can be dazzling until the pupil-widening drops wear off. Most people notice clearer vision within a day or two and can usually return to normal activities quickly.
What to expect
The improvement is usually permanent, as the same membrane does not cloud again. It is a very safe procedure, with a small risk of raised eye pressure or, rarely, retinal problems, so you may have a check afterwards.
Conditions this can help
Frequently asked questions
Is YAG capsulotomy the cataract coming back?
No. A cataract cannot return once removed. YAG capsulotomy treats clouding of the membrane behind the lens implant, which is a common, separate change after cataract surgery.
Does YAG laser capsulotomy hurt?
No, it is painless. The eye is numbed with drops and you simply see flashes of light during the few minutes of treatment.
How quickly does vision improve after YAG capsulotomy?
Most people notice clearer vision within a day or two, once any temporary floaters and blur from the procedure settle.