As with all surgeries, cataract surgery involves risks and potential complications. Complications may become serious and life threatening in some cases. Complications can develop during surgery or recovery. General risks of surgery The general risks of surgical procedures include: Anesthesia reaction, such as an allergic reaction and problems with breathing Bleeding Infection Potential complications of cataract surgery Complications of cataract surgery are rare, but can be serious. Potential complications include: Bleeding inside the eye Capsular contraction, which occurs when the tissue that supports your IOL (called the capsule) scars and contracts during healing. This may cause vision changes and prevent accommodative lenses from functioning properly. Dislocated or de-centered IOL Glaucoma or increased pressure inside your eye Inflammation or swelling Night vision problems, such as seeing glare, halos or starbursts around lights at night. These effects are usually temporary. Posterior capsule tear or a tear in the thin structure that holds your natural lens and will hold your IOL Retinal tear or detachment, which is a medical emergency. Symptoms include a sudden appearance of flashes or floaters. Seek immediate medical care for symptoms of retinal detachment to prevent permanent vision loss. Secondary cataracts, sometimes called posterior capsule opacification or PCO, which occur when the capsule or tissue that supports your IOL becomes cloudy. Secondary cataracts can develop months or even years after cataract surgery. They are typically treated with an outpatient laser procedure. Reducing your risk of complications You can reduce the risk of certain complications by following the treatment plan and: Following activity, dietary and lifestyle restrictions and recommendations before surgery and during recovery Notifying your doctor immediately of any concerns, such as bleeding, fever, increase in pain, or wound redness, swelling or drainage Taking your medications exactly as directed Telling all members of your care team if you have any allergies