Cataract Surgery: What to Expect Before, During, and After

Cataract surgery is the most frequently performed procedure at ambulatory surgery centers nationally. It's also one of the most effective surgeries in medicine — vision improves in roughly 97% of cases, and the procedure itself typically takes 10 to 20 minutes per eye. Despite how common and well-refined it is, most patients go in with more uncertainty about the process than the numbers would suggest is necessary. Here's what actually happens.

What a cataract is, briefly

The eye's natural lens sits behind the iris and normally is clear. A cataract is a clouding of that lens, usually caused by age-related protein changes, though it can also result from diabetes, certain medications, or eye trauma. Vision becomes blurry, colors dull, and glare from headlights or sunlight becomes more bothersome — often gradually enough that patients don't notice how much they've adapted around it until after surgery restores clarity.

Surgery is the only treatment that reverses a cataract. There is no eye drop, supplement, or exercise that dissolves or slows one meaningfully once it's affecting vision. Surgery is typically recommended once the cataract starts interfering with daily activities like driving, reading, or work — not simply because one is present on an eye exam.

The procedure itself

The standard technique is phacoemulsification: a small incision, usually under 3mm and self-sealing without stitches, through which an ultrasonic probe breaks up the clouded lens and removes it. An artificial intraocular lens (IOL) is then folded and inserted through the same incision, where it unfolds and stays permanently.

Anesthesia is typically local — numbing eye drops plus a mild sedative, not general anesthesia. Most patients are awake but relaxed and feel no pain, though some pressure or awareness of movement is normal. You'll be positioned under a surgical microscope with your eye held gently open; you won't be able to see details of the procedure itself, just light and movement.

One eye is done at a time, typically with the second eye scheduled 1 to 4 weeks later if both need surgery. This staggered approach lets the surgeon confirm how the first eye is healing and lets you function with one clear eye while the second recovers.

Choosing a lens: the decision that happens before surgery day

The intraocular lens you receive is a real decision, not a default. Standard monofocal lenses are covered by Medicare and most insurance and correct vision at one distance, usually far, meaning you'll likely still need reading glasses afterward. Premium lenses — multifocal, extended depth of focus, or toric lenses that also correct astigmatism — can reduce dependence on glasses at multiple distances but typically carry an out-of-pocket cost beyond what insurance covers, often several hundred to a few thousand dollars per eye.

This decision needs to happen during your pre-operative consultation, not on surgery day. Ask specifically what your out-of-pocket cost would be for each lens option, and ask the surgeon which lens they'd recommend given your specific vision needs and any astigmatism.

The first 24 to 48 hours

Vision is often blurry or hazy immediately after surgery — this is expected and not a sign anything went wrong. A clear protective shield is usually worn over the eye for the rest of surgery day and while sleeping for about a week, to prevent accidental rubbing or pressure.

You will need a ride home; sedation alone makes driving unsafe that day, separate from any vision changes. Mild scratchiness, light sensitivity, and some redness are normal in the first day or two. Prescription eye drops — typically an antibiotic and an anti-inflammatory — are started immediately and need to be used exactly on the schedule given, not just when symptoms flare, since they're working to prevent infection and control inflammation, not just relieve discomfort.

Recovery over the following weeks

Most of the visual improvement happens within the first few days to a week, with continued fine-tuning over the following month as the eye fully settles. Full recovery, including the eye's final stable shape, typically takes 4 to 6 weeks, though most people resume normal activities well before that.

Avoid rubbing the eye, swimming, and strenuous exercise or heavy lifting for about a week, per your surgeon's specific instructions. Bending over is generally fine in moderation but avoid activities that significantly increase pressure in the eye during the early healing period.

When to call the surgeon rather than wait it out

Sudden vision loss, significant increasing pain, or a substantial increase in redness after the first couple of days are not part of a normal recovery and should prompt a call to the surgical practice, not a wait-and-see approach. Flashes of light or a sudden increase in floaters also warrant a same-day call, since they can indicate retinal issues unrelated to the cataract surgery itself but requiring prompt evaluation.