Posterior Capsular Opacification / Secondary Cataract
Also known as Posterior Capsule Opacification, PCO, Secondary Cataract, After-Cataract, Cloudy Capsule
Bottom Line
Posterior capsular opacification is a cloudy film behind the lens implant after cataract surgery. It can blur vision again, but a quick office laser usually clears it.
Posterior capsular opacification happens after cataract surgery. The natural lens is removed, but the thin back capsule stays to hold the new lens implant.
Over months or years, leftover lens cells can grow across that back capsule. This makes vision hazy, glary, or cloudy again 1.
It is often called a secondary cataract, but the cataract has not grown back. Treatment opens the cloudy capsule with an office laser procedure 2.
Symptoms
Posterior capsular opacification usually causes slow, painless blur after cataract surgery.
- Hazy or foggy vision. Many people say the cataract feels like it came back.
- More glare. Headlights, sun, or bright rooms can bother you.
- Lower contrast. Fine details may look washed out.
- Reading trouble. Print may look smudged even with glasses.
The condition is common after cataract surgery and is caused by opacification of the posterior capsule 3.
Diagnosis
An eye doctor checks vision, glasses prescription, eye pressure, the lens implant, and the retina. This matters because dry eye, macular disease, glaucoma, and prescription change can also blur vision.
The cloudy capsule is usually visible at the slit lamp. The doctor decides whether the clouding lines up with your symptoms.
Treatment
The usual treatment is laser capsulotomy. The doctor uses a focused laser to make a small clear opening in the cloudy back capsule.
Vision often clears quickly, but the doctor still checks for risks. A five-year cumulative incidence and risk factor study tracked laser capsulotomy after hydrophobic acrylic lens implantation 4.
Call right away after treatment for flashes, a curtain or shadow, many new floaters, sudden pain, or sudden vision loss. A nationwide study tracked retinal detachment, macular edema, and eye pressure events after laser capsulotomy 5.
Common Questions About Posterior Capsular Opacification
Next Steps
- 1Book an eye exam if vision gets cloudy months or years after cataract surgery.
- 2Ask whether the blur matches posterior capsular opacification or another eye problem.
- 3Bring your cataract surgery records if you have them.
- 4Ask about laser capsulotomy risks if treatment is recommended.
- 5Seek urgent care for sudden vision loss, severe pain, flashes with a curtain, or many new floaters.
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