YAG Laser Capsulotomy (Posterior Capsulotomy)

YAG laser capsulotomy is a quick, in-office laser procedure used to restore clear vision after cataract surgery. It treats a common condition called posterior capsule opacification (PCO) — sometimes called a secondary cataract — where the lens capsule behind your intraocular lens (IOL) becomes cloudy over time. The procedure takes less than 10 minutes and requires no incisions, stitches, or lengthy recovery period.

What is posterior capsule opacification (PCO)?

During cataract surgery, your surgeon removes your cloudy natural lens and replaces it with a clear artificial lens implant (IOL). That IOL sits inside a thin membrane called the lens capsule. Over time, residual cells can grow on the back wall of that capsule, making it hazy.

PCO is the most common complication following cataract surgery, which is otherwise a highly successful form of eye surgery. It’s not a sign that anything went wrong; it’s simply a biological response that some eyes are more prone to than others. It can develop months or even years after an otherwise successful procedure.

What causes vision to become cloudy again after cataract surgery?

As the posterior capsule becomes hazy, light scatters instead of focusing cleanly on the retina. This causes blurry vision, glare, and reduced contrast. These symptoms can feel very similar to the original cataract returning. But the cloudiness isn’t coming from the IOL itself. The lens implant remains clear. It’s the capsule behind it that’s the issue, and that’s precisely what the YAG laser targets.

What are the symptoms of posterior capsule opacification?

● Blurry or hazy vision that has gradually returned after cataract surgery

● Glare or halos around bright lights, especially at night

● Difficulty reading or seeing fine detail

● Colors that appear washed out or less vivid

● Reduced contrast or overall haziness in your vision

The decision to treat is similar to the original decision to address your cataract — it depends on whether the cloudiness is meaningfully affecting your vision and daily life.

What does YAG stand for?

YAG stands for yttrium aluminum garnet, a synthetic crystal that gives this special laser its precise properties. The full name of the laser is the neodymium-doped yttrium aluminum garnet laser or Nd: YAG laser for short. This piece of equipment delivers short, focused pulses of laser energy that create a small, clear opening in the cloudy capsule without disturbing the lens implant in front of it or the retina at the back of your eye.

How is YAG laser capsulotomy performed?

The YAG laser procedure takes place in the office and requires no sedation.

Your eye doctor will first apply numbing and dilating eye drops to widen your pupil and prepare the eye. You’ll be seated at the laser unit, which should feel similar to a standard slit lamp exam. In some cases, a small contact lens is placed on your eye with a lubricating gel to help focus the laser precisely. You’ll be asked to hold your gaze steady while the laser fires.

The laser is silent to you, and you won’t feel anything in your eye. You may notice brief flashes of light or color and hear a faint clicking sound. The entire treatment typically takes five to ten minutes. Afterward, you’ll remain in the office for a 30 to 60-minute follow-up, so your eye pressure can be checked before you leave.

What is recovery like after posterior capsulotomy?

Recovery is minimal. There’s no incision to heal and typically no significant discomfort. You’ll need a driver on the day of the procedure, as your pupils will remain dilated for several hours. Most patients return to normal activities the following day.

In the days following the procedure, it can be common to notice floaters, which are small fragments from the capsule, drifting through your vision. These usually settle or disappear within a few weeks. Vision improvement can begin within hours, though it may take a few days to fully stabilize.

How effective is YAG capsulotomy?

Results are consistently strong, according to data often cited by the American Academy of Ophthalmology. Between 83% and 96% of patients experience meaningful visual improvement after the procedure, with some studies reporting rates as high as 98%. For most patients, a single treatment is all that’s needed. The opening created in the capsule is permanent, and PCO does not recur in the treated area.

What are the risks of YAG laser capsulotomy?

YAG capsulotomy has a relatively low risk of side effects, and complications are uncommon.

The most common side effect is a temporary rise in intraocular pressure (eye pressure) immediately after the procedure. This is why our doctors will monitor your pressure before you leave. If needed, eye drops can help restore it to normal. Patients with a history of glaucoma require closer monitoring.

Less common risks include macular edema (swelling at the center of the retina), retinal detachment or retinal tearing (more likely in highly nearsighted eyes), displacement of the intraocular lens, and corneal edema. Your doctor will review your individual risk profile before proceeding.

Experiencing post-cataract haziness? Contact Assil Guar Eye Institute

If your vision has become cloudy again after cataract surgery, our ophthalmology team or your optometrist can evaluate whether YAG laser capsulotomy is right for you. We provide comprehensive eye care, eye health services, and healthcare for patients throughout the Los Angeles area, including Beverly Hills, Santa Monica, West Los Angeles, West Hollywood, Culver City, Hollywood, Venice, Marina del Rey, Malibu, Manhattan Beach, and Downtown Los Angeles.

Call now or book your appointment online.

Written by The AGEI Educational Team

The Assil Gaur Eye Institute Education Team is dedicated to providing accurate, accessible, and patient-centered eye health information to support not only our patients, but the broader community as well. Working closely with our physicians and specialists, the team helps develop educational content designed to empower patients to better understand their vision, eye conditions, treatment options, and advances in ophthalmology. Our goal is to make complex medical topics easier to understand while upholding the highest standards of clinical accuracy, trust, and patient care.

The Assil Gaur Eye Institute Education Team is dedicated to providing accurate, accessible, and patient-centered eye health information to support not only our patients, but the broader community as well. Working closely with our physicians and specialists, the team helps develop educational content designed to empower patients to better understand their vision, eye conditions, treatment options, and advances in ophthalmology. Our goal is to make complex medical topics easier to understand while upholding the highest standards of clinical accuracy, trust, and patient care.

Medically Reviewed by Dr. Kerry Assil

Kerry K. Assil, MD, is regarded as one of the world’s foremost experts in refractive surgery, having made significant advances in the field with his numerous inventions. Additionally he has the unique distinction of having trained thousands of eye surgeons in the latest refractive surgical techniques. Dr. Assil has authored more than one hundred textbooks, textbook chapters and articles on refractive surgery and has appeared regularly on major television network news programs as a pioneer in refractive surgery. He also leads educational forums for other eye care professionals, which have included featured lectureships at Harvard University, Johns Hopkins University and Tokyo University.

Kerry K. Assil, MD, is regarded as one of the world’s foremost experts in refractive surgery, having made significant advances in the field with his numerous inventions. Additionally he has the unique distinction of having trained thousands of eye surgeons in the latest refractive surgical techniques. Dr. Assil has authored more than one hundred textbooks, textbook chapters and articles on refractive surgery and has appeared regularly on major television network news programs as a pioneer in refractive surgery. He also leads educational forums for other eye care professionals, which have included featured lectureships at Harvard University, Johns Hopkins University and Tokyo University.