Cataract surgery itself takes 10 to 20 minutes, depending on the severity of the cataract. The results are designed to be permanent: the artificial lens placed in your eye lasts a lifetime and never needs routine replacement. Most people searching this question want to know one or both of those things, so let’s cover the full picture.
How Long the Procedure Takes
The actual surgical time runs 10 to 20 minutes per eye. You’ll be awake but won’t feel pain because your eye is numbed with drops. Plan to spend about two to three hours at the surgical center total, which includes check-in, preparation, the procedure, and a short observation period afterward.
If you need both eyes done, they’re typically scheduled on separate days, usually a week or two apart. This gives the first eye time to begin healing before the second is treated.
How Long the Results Last
The artificial lens implanted during surgery is permanent. Unlike a contact lens or glasses prescription, it doesn’t wear out or degrade over time. Over 90% of patients achieve 20/20 vision with glasses after the procedure, and the infection rate is below 0.1%.
That said, “permanent” doesn’t mean nothing will ever change. There are a few things that can happen years down the road, though none of them mean the surgery failed.
The Most Common Follow-Up: Secondary Clouding
The artificial lens sits inside a thin natural membrane called the capsule. Over time, this capsule can become cloudy on its own, gradually blurring your vision again. This is sometimes called a “secondary cataract,” though it’s not actually a new cataract forming. It’s the most common long-term issue after surgery, affecting roughly 12% of people within the first year and about 28% within five years.
The fix is a quick laser procedure called a YAG capsulotomy. It takes a few minutes in your eye doctor’s office, requires no anesthesia beyond numbing drops, and clears the clouding immediately. Studies show 83% to 96% of people see meaningful improvement afterward, with one study reporting a 99% improvement rate. You only need it once for that eye.
Rare Long-Term Complications
Lens dislocation, where the implanted lens shifts out of position, is uncommon but worth knowing about. A population-based study tracking patients over 25 years found the risk was just 0.1% at 10 years after surgery, rising to 1.7% at the 25-year mark. When it does happen, a surgeon can reposition or replace the lens.
Lens clouding (opacification of the implant itself) is extremely rare with modern lenses and requires a replacement if it occurs. A “refractive surprise,” where your post-surgery vision isn’t as sharp as expected, can sometimes be corrected with glasses, LASIK, or a lens exchange. These scenarios are the exception, not the rule.
What Recovery Looks Like
Full healing takes about four weeks, but most people notice clearer vision within a few days. Things will look blurry right after the procedure, which is normal. Your vision continues sharpening over the following days and weeks as the eye settles around the new lens.
The recovery restrictions are mild but important for preventing infection. Light walking is fine the day after surgery. More vigorous activities like running, biking, golf, and tennis should wait 7 to 10 days. Swimming requires a two-week break to keep bacteria and irritants away from the healing eye. Your ophthalmologist will tell you when driving is safe, which for most people is within a few days once vision is clear enough.
You’ll use prescription eye drops for several weeks to prevent infection and control inflammation. Most people return to work within a few days to a week, depending on how physically demanding their job is.
Do You Need New Glasses Afterward?
The type of artificial lens you choose affects this. A standard single-focus lens corrects distance vision well, but you’ll likely still need reading glasses. Premium multifocal or extended-depth lenses reduce dependence on glasses for both near and far tasks, though they don’t eliminate it for everyone. Your final glasses prescription, if needed, is typically determined four to six weeks after surgery once your vision has fully stabilized.