Cataract surgery is one of the least invasive surgeries performed in modern medicine. The procedure takes 10 to 20 minutes, uses an incision roughly 2 to 3 millimeters wide, requires no general anesthesia, and almost never needs stitches. You’re awake the entire time, go home the same day, and most people return to normal activities within a few days.
What Actually Happens During the Procedure
The surgeon makes a tiny incision at the edge of your cornea, typically small enough that it seals on its own without sutures. Through that opening, an ultrasound probe (called phacoemulsification) breaks your clouded lens into small fragments that are suctioned out. A clear artificial lens is then folded, slipped through the same small incision, and unfolded into position inside your eye. The whole process, start to finish, takes 10 to 20 minutes depending on how dense the cataract is.
A newer option uses a femtosecond laser to automate three key steps: creating the corneal incision, opening the lens capsule, and breaking up the clouded lens before the ultrasound probe finishes the job. This laser-assisted approach reduces the amount of ultrasound energy needed inside your eye, though large studies have found that outcomes like corneal cell loss and swelling are similar between the two techniques. The laser version does not reduce most complication rates compared to the conventional approach.
Anesthesia and What You Feel
You stay awake throughout cataract surgery. Before the procedure, numbing eye drops are applied to eliminate pain, and you receive a mild sedative through an IV to keep you relaxed. The most commonly used sedative is midazolam, which reduces anxiety and often blurs your memory of the procedure afterward.
In a study of over 300 cases that measured patient-reported pain on a 0 to 4 scale, 31.5% of patients felt no sensation at all, and another 41% reported only a mild sensation. That means about 72% of patients experienced little to nothing. Moderate pain was reported in 23.3% of cases, and intense or unbearable pain in just 4.3%. Most patients describe feeling brief moments of pressure rather than sharp pain. During the surgery, you’ll be asked to look at a bright light that may shift colors and move, sometimes described as a kaleidoscope effect. You may also hear a soft humming from the ultrasound instrument.
No Hospital Stay Required
Cataract surgery is an outpatient procedure. You arrive, have the surgery, spend a short time in recovery, and go home the same day. As of 2014, 73% of cataract surgeries in the U.S. were performed in ambulatory surgery centers rather than hospitals, a shift from just 43.6% in 2001. Overnight stays are extremely rare and only happen if there’s an unusual complication or the patient has other serious medical conditions that require monitoring.
Complication Rates
Cataract surgery carries one of the lowest serious complication rates of any surgical procedure. The most feared complication is endophthalmitis, a severe infection inside the eye. Among Medicare patients tracked from 2016 to 2019, the rate of this infection after cataract surgery was 0.08%, or roughly 1 in 1,250 procedures. That was the lowest rate among all types of eye surgery studied. For comparison, corneal transplants had an infection rate of 0.43% and retina surgeries came in at 0.24%.
More common but less serious side effects include temporary blurry vision, mild swelling of the cornea, dry eye, and sensitivity to light. These typically resolve within days to weeks without additional treatment. A small percentage of patients develop a clouding of the membrane behind the artificial lens months or years later, sometimes called a “secondary cataract,” which is easily corrected with a quick laser treatment in the office.
Recovery Timeline
The incision begins closing within the first 24 hours as the eye’s surface seals shut, though the deeper layers of tissue take a few weeks to fully heal. Any redness around the eye typically fades within a few days. Vision stabilizes for most patients within 2 to 3 weeks.
During the first 48 hours, you should avoid bending over or putting your head below your waist, as this increases pressure inside the eye and can interfere with healing. Light activities like walking are fine almost immediately. Your ophthalmologist will tell you when driving is safe, which varies depending on how quickly your vision clears and whether you had surgery on one or both eyes. Depth perception can feel off temporarily if only one eye has been treated. Most people return to exercise and normal routines within a week or two, with strenuous lifting and swimming typically restricted a bit longer to protect the healing incision.
You’ll use prescription eye drops for several weeks after surgery to prevent infection and control inflammation. Follow-up appointments are usually scheduled for the day after surgery, then again at one week and one month to confirm the eye is healing properly.