Have you had cataract surgery but are now noticing cloudy vision again? It’s natural to wonder whether your cataract has returned or if something else is going on.
For many patients, this cloudy vision is caused by a condition called posterior capsule opacification (PCO). Below, we’ll explain what this condition is, why it happens, and how it’s treated.
What Is Posterior Capsule Opacification (Secondary Cataract)?
A secondary cataract is not actually a cataract at all. Instead, it’s a clouding of the lens capsule, the thin membrane that holds your artificial lens implant in place after cataract surgery.
During cataract surgery, your ophthalmologist removes the eye’s natural lens and replaces it with an artificial intraocular lens (IOL). The lens capsule itself is left intact to support the new lens.
While most people enjoy long-lasting improvement after surgery, some develop posterior capsule opacification months or even years later.
Secondary cataracts can cause symptoms similar to the original cataract, including halos around lights, sensitivity to light, difficulty reading and cloudy or blurred vision.
How Is a Secondary Cataract Different from the Original Cataract?
While it’s easy to assume a secondary cataract means your original cataract has returned, that’s not possible. Here’s why…
Cataracts can only form on the natural lens you’re born with. During cataract surgery, that lens is removed and replaced with an artificial intraocular lens, which means cataracts cannot form on the new lens.
With posterior capsule opacification, cloudy patches develop on the lens capsule rather than the lens itself. Over time, this cloudiness can interfere with how light passes through the eye, affecting vision.
PCO most often develops months or years after cataract surgery.
What Causes Posterior Capsule Opacification?
When your natural lens is removed during surgery, tiny lens epithelial cells may remain behind. As part of the healing process, these cells can migrate and collect on the lens capsule.
As they build up, the capsule may gradually become cloudy, leading to vision changes.
Anyone who has had cataract surgery can develop PCO, but the risk may be slightly higher in people with conditions such as diabetic retinopathy, glaucoma, uveitis or retinitis pigmentosa.
How Is a Secondary Cataract Treated?
The good news is that PCO can be treated quickly and effectively with a procedure called YAG laser capsulotomy.
This in-office laser procedure usually takes only a few minutes. First, your eye is numbed with special drops. Then, a laser is used to create a small opening in the cloudy lens capsule, allowing light to pass through clearly again.
Vision often improves within a day. Some patients notice temporary floaters afterward, which are simply tiny debris particles from the laser treatment and usually fade on their own.
Most people experience excellent, long-lasting results. It’s uncommon for PCO to recur, but if it does, the same procedure can be performed again.
If you’ve noticed cloudy vision after cataract surgery, our team at North Florida Cataract Specialists and Vision Care can help determine whether posterior capsule opacification is the cause and discuss treatment options. Contact us today at 352-373-4300 to schedule your appointment.