Cataract surgery is one of the safest and most frequently performed operations, with serious complication rates well under 2%. But minor problems are common in the days and weeks afterward, and a few issues can develop months or even years later. Knowing what to expect helps you tell the difference between normal healing and something that needs attention.
Dry Eye and General Discomfort
The most common complaint after cataract surgery is dry, gritty, or irritated eyes. The procedure disrupts nerves on the surface of your cornea, temporarily reducing your eye’s ability to sense dryness and produce tears on cue. Most people notice this as a scratchy or foreign-body sensation that peaks in the first week or two. Preservative-free artificial tears are the standard remedy, and for most people the discomfort fades steadily over one to three months as those surface nerves regenerate.
Blurry Vision in the First Week
Some degree of blurry or hazy vision is normal immediately after surgery. One common cause is corneal swelling. The instruments used during the procedure temporarily stress the cells that keep your cornea clear by pumping fluid out of it. Mild swelling can persist for up to two weeks without concern, and it sometimes takes several weeks to fully resolve. If your vision is still not improving after about four weeks, that may signal lasting damage to those pumping cells, which occasionally requires a follow-up procedure to repair.
Light Sensitivity and Glare
Your new artificial lens sits in a slightly different position than your natural lens did, and its edges can reflect light in ways your brain isn’t used to. This produces two types of visual disturbances. “Positive” dysphotopsia shows up as streaks, arcs, or flickers of light in your peripheral vision, typically triggered by a bright light source off to one side. “Negative” dysphotopsia is the opposite: a dark shadow or crescent shape, usually on the outer edge of your field of view.
Both types are common in the early weeks. Symptoms often improve around four to six weeks after surgery as your brain adapts to the new lens. In some cases, full adaptation takes up to a year. The vast majority of people find these disturbances resolve on their own without any additional treatment.
Posterior Capsule Clouding
This is the single most common long-term problem after cataract surgery. During the operation, your surgeon removes the clouded lens but leaves behind a thin, clear capsule to hold the new artificial lens in place. Over time, cells can grow across the back surface of that capsule, making your vision hazy again. It feels a lot like the original cataract returning.
Posterior capsule clouding affects 20% to 50% of patients within two to five years of surgery. In children, the rate approaches 100%. The fix is a quick, painless laser procedure done in the office that takes just a few minutes. It creates a small opening in the clouded capsule, and vision typically clears within a day or two. The clouding does not come back after this treatment.
Pressure Spikes Inside the Eye
Eye pressure can rise in the first couple of days after surgery. This happens more often in people who already have glaucoma, but it can also occur in people with no prior eye pressure issues. In most cases the spike is temporary and settles within the first week with the help of pressure-lowering drops. Your surgeon will check your eye pressure at your post-op visit specifically to catch this. People with a history of glaucoma should be especially attentive to any new eye pain or sudden vision changes in the days after surgery.
Swelling in the Retina
A condition called cystoid macular edema occurs when fluid collects in the central part of the retina, the light-sensitive tissue at the back of your eye. It typically shows up around six weeks after surgery, making your vision blurry or wavy. Anti-inflammatory eye drops are the usual treatment, and most cases resolve over time. People with diabetes or a history of eye inflammation are at higher risk.
Retinal Detachment
Retinal detachment is rare but serious. It occurs in roughly 1 in 500 cataract surgeries within the first year. Certain factors raise the risk substantially: being male (about three times higher risk), being younger (the highest risk is in patients aged 40 to 50), having high nearsightedness, and having a pre-existing retinal condition called lattice degeneration, which raises the odds more than tenfold.
The warning signs are distinctive. A sudden burst of new floaters that looks like someone sprayed spots across your vision, flashes of light like a camera going off, or a shadow or curtain creeping into your side vision all warrant an immediate call to your eye doctor. Retinal detachment is treatable, but outcomes are much better the sooner it’s caught.
Infection
Infection inside the eye (endophthalmitis) is the most feared complication but also one of the rarest, occurring in roughly 0.03% to 0.2% of surgeries. The most common sign is progressively worsening vision, often accompanied by increasing pain and redness, though up to 25% of cases present without significant pain. Symptoms typically develop within the first week. Antibiotic drops used before and after surgery have pushed infection rates lower over the past two decades. Surgeon experience also matters: high-volume surgeons who perform 1,000 or more procedures a year have complication rates roughly four times lower than surgeons who perform fewer than 100.
Signs That Need Prompt Attention
Most post-surgical symptoms are part of normal healing. But a few specific patterns signal something that needs same-day evaluation:
- Sudden shower of floaters or flashes of light: possible retinal detachment.
- A shadow or curtain in your side vision: also suggests retinal detachment.
- Increasing pain with redness and light sensitivity: possible infection or severe inflammation.
- Vision that gets worse instead of better after the first few days: could indicate swelling, pressure problems, or infection.
- Blurriness that hasn’t improved at all after one week: warrants a check-in with your surgeon.
The overall picture is reassuring. The vast majority of people come through cataract surgery with significantly better vision and no lasting complications. The problems that do occur are well understood, and most of them, from dry eye to capsule clouding, have straightforward treatments.