For some patients, laser treatment for posterior capsular opacification can cause short-term increased eye pressure. This can be an issue if you already have glaucoma, as your eye pressure may already be higher than normal.
If your ophthalmologist is concerned about this, he will check your eye pressure soon after the treatment. And if your eye pressure has increased, you will receive eye drops or tablets to lower it down.
The treatment can rarely cause retinal detachment, where the nerve layer (retina) lifts from the back of your eye. This can happen days, weeks, or months after capsulotomy. It is more likely if you are very short-sighted.