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What Is a Laser Capsulotomy?

A laser capsulotomy is a procedure that uses a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser to create an opening in a cloudy posterior lens capsule after cataract surgery. The cloudiness is called posterior capsule opacification, and it can cause glare and blurred vision that feels like a cataract returning. Creating a small opening lets light pass through clearly again. It is typically done in the clinic and takes only a few minutes.

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What Is a Laser Capsulotomy?

A laser capsulotomy is a procedure that uses a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser to create an opening in a cloudy posterior lens capsule after cataract surgery. The cloudiness is called posterior capsule opacification, and it can cause glare and blurred vision that feels like a cataract returning. Creating a small opening lets light pass through clearly again. It is typically done in the clinic and takes only a few minutes.

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Why a Laser Capsulotomy Is Done

Posterior capsule opacification can develop weeks, months, or years after cataract surgery as lens epithelial cells scatter light. Symptoms often include hazy vision, glare, halos, and reduced contrast, especially in bright light or at night. If the clouding affects daily activities or measured vision, Nd:YAG capsulotomy may be recommended. The goal is to restore clarity, not to change the implanted intraocular lens (IOL).

How Nd:YAG Capsulotomy Works

The eye is numbed with drops, and a special lens may be placed on the eye to help focus the laser. The laser delivers short pulses to cut a small central opening in the cloudy capsule behind the intraocular lens. Most people see brief flashes of light during the treatment. Afterward, the doctor usually checks intraocular pressure and may prescribe anti-inflammatory drops.

Recovery and What to Expect

Vision often improves within hours to a day, but some people notice temporary blur from dilation or mild inflammation. Floaters can occur because tiny capsule fragments move in the vitreous, and they usually fade with time. Most patients return to normal activities quickly, but driving should wait until vision is clear and safe. Follow-up is important to confirm pressure is stable and the opening remains clear.

Risks and Complications

Complications are uncommon, but they can occur. Possible risks include a temporary rise in intraocular pressure, inflammation, and pitting of the intraocular lens. Less common complications include cystoid macular edema and retinal tear or retinal detachment, especially in higher-risk eyes. Prompt evaluation is needed for new flashes, a shower of floaters, a curtain-like shadow, or sudden vision loss.

FAQs on Laser Capsulotomy

Does a laser capsulotomy remove a cataract?

No. A laser capsulotomy treats posterior capsule opacification, which is clouding of the capsule left in place after cataract surgery. The cataract lens itself has already been removed during the original surgery. The laser simply opens the cloudy capsule to restore a clear pathway for light.

Is Nd:YAG laser capsulotomy painful?

It is usually not painful because numbing drops are used. You may feel mild pressure or brief discomfort, and you may see bright flashes of light. Significant pain is not expected and should be reported.

How quickly will vision improve after the procedure?

Many people notice clearer vision the same day or within 24 hours. Vision can take longer to stabilize if there is inflammation or if you develop cystoid macular edema. Your doctor will advise follow-up based on your risk factors and symptoms.

Can a laser capsulotomy be repeated?

It is usually a one-time treatment because the opened capsule does not grow back in the same way. Rarely, additional laser may be needed if the opening is too small or if residual strands affect vision. Your doctor will confirm the cause before recommending repeat treatment.

References

YAG Laser Capsulotomy: What It Is, Procedure & Benefits. Cleveland Clinic. https://my.clevelandclinic.org/health/treatments/21139-yag-laser-capsulotomy. Date Accessed February 5, 2026.

Posterior Capsule Opacification. EyeWiki (American Academy of Ophthalmology). https://eyewiki.org/Posterior_Capsule_Opacification. Date Accessed February 5, 2026.

Laser Principles in Ophthalmology. StatPearls - NCBI Bookshelf (National Library of Medicine, National Institutes of Health). https://www.ncbi.nlm.nih.gov/books/NBK580539/. Date Accessed February 5, 2026.

Femtosecond laser-assisted cataract surgery: Update and mini-review (background on PCO risk and downstream YAG). PubMed Central (National Library of Medicine, National Institutes of Health). https://pmc.ncbi.nlm.nih.gov/articles/PMC10017866/. Date Accessed February 5, 2026.

Femtosecond laser-assisted cataract surgery (FLACS) (clinical context for post-cataract complications including PCO/YAG). PubMed (National Library of Medicine). https://pubmed.ncbi.nlm.nih.gov/40769413/. Date Accessed February 5, 2026.