Cataract Surgery Complications: How Common Are They?

When complications do occur, they range from mild and temporary issues to rare but more serious events. Posterior capsule opacification, sometimes called a secondary cataract, is the most common long-term development after cataract surgery, occurring in approximately 20 to 30 percent of patients within two to five years according to the American Academy of Ophthalmology. It occurs when the thin membrane left behind to support the new intraocular lens becomes cloudy over time. This is not a true complication of the surgery itself but rather a natural healing response. It is easily treated with a brief, painless laser procedure called a YAG capsulotomy.

Cystoid macular edema involves swelling in the central retina, the macula, caused by fluid accumulation after surgery. Clinical CME occurs in roughly 0.1 to 2 percent of routine cataract procedures, though subclinical swelling detected only on imaging can be more common. Patients with diabetes, uveitis, or a history of retinal surgery may be at higher risk and are monitored more closely during follow-up visits. Most cases respond well to anti-inflammatory eye drops, and vision typically returns to expected levels within several weeks of treatment.

A temporary rise in intraocular pressure can occur in the hours or days following cataract surgery. This is usually mild and resolves on its own or with short-term use of pressure-lowering eye drops. Patients with a history of glaucoma may be monitored more closely for this possibility. Our team checks your eye pressure at every postoperative visit to catch and manage any elevation early.

Some degree of inflammation is expected after any intraocular surgery. Mild redness, light sensitivity, and a gritty sensation are common during the first week and typically resolve as prescribed anti-inflammatory and antibiotic eye drops take effect. Persistent or worsening inflammation beyond the first week should be reported promptly so we can evaluate and adjust your treatment plan.

Many patients notice increased dryness or a foreign-body sensation in the weeks following cataract surgery. The small incision and use of antiseptic solutions during the procedure can temporarily disrupt the tear film. Preservative-free artificial tears are usually sufficient to manage this, and symptoms tend to improve within one to three months. Patients who already experience dry eye may benefit from discussing preventive strategies with our team before surgery.

Cystoid macular edema is a condition in which small pockets of fluid collect in the macula, the part of the retina responsible for sharp central vision. It typically develops four to six weeks after surgery and can cause blurry or distorted central vision. Most cases are treated successfully with a combination of anti-inflammatory and non-steroidal eye drops.

Retinal detachment is a rare but serious complication that can occur weeks, months, or even years after cataract surgery. The overall risk is estimated at less than 1 percent, though patients with high myopia, or severe nearsightedness, face a somewhat elevated risk. Symptoms include a sudden increase in floaters, flashing lights, or a shadow or curtain effect in your peripheral vision. If you experience any of these warning signs, seek evaluation immediately, as prompt treatment can preserve vision.

Certain preexisting eye conditions can raise the likelihood of complications. These include advanced glaucoma, diabetic retinopathy, pseudoexfoliation syndrome, prior intraocular surgery, very dense or mature cataracts, and weak zonular support. General health conditions such as uncontrolled diabetes or use of blood-thinning medications may also play a role. Our cataract surgeons evaluate each patient thoroughly before surgery to identify risk factors and adjust the surgical plan accordingly. Your intraocular lens selection may also be tailored based on your individual eye health.

Treatment depends on the specific complication. Elevated eye pressure is typically managed with pressure-lowering drops. Persistent inflammation or cystoid macular edema often responds to anti-inflammatory medications. A dislocated or malpositioned intraocular lens may require a repositioning procedure. The key to successful treatment is early detection, which is why attending all of your scheduled postoperative appointments is so important for your recovery and long-term visual health.

While mild discomfort, light sensitivity, and slightly blurry vision are normal in the early days of recovery, certain symptoms should prompt an immediate call to our office. These include sudden or severe pain, a noticeable decrease in vision, significant increase in redness, new onset of flashing lights or floaters, and discharge from the eye.