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What Is a YAG (Neodymium:YAG) Laser?

A YAG (Neodymium:YAG) laser is a medical laser that can make a tiny, precise opening in targeted eye tissue. In eye care, it is best known for a treatment that clears vision when the capsule behind a lens implant becomes cloudy after cataract surgery. This laser works through photodisruption, which means it creates a controlled, localized ?break? in tissue rather than burning it. The procedure is usually done in a clinic and often takes only a few minutes. Your eye doctor decides if you need it based on your symptoms and exam findings.

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What Is a YAG (Neodymium:YAG) Laser?

A YAG (Neodymium:YAG) laser is a medical laser that can make a tiny, precise opening in targeted eye tissue. In eye care, it is best known for a treatment that clears vision when the capsule behind a lens implant becomes cloudy after cataract surgery. This laser works through photodisruption, which means it creates a controlled, localized ?break? in tissue rather than burning it. The procedure is usually done in a clinic and often takes only a few minutes. Your eye doctor decides if you need it based on your symptoms and exam findings.

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Common Eye Treatments Done With a YAG Laser

The most common use is a YAG capsulotomy to open a cloudy capsule behind a cataract lens implant. In certain cases, it can also be used to create a small opening in the iris when medically needed. The exact use depends on which structure is causing the problem. Your doctor will explain what is being treated and why.

What Happens During the Procedure

You usually get numbing drops, and the doctor uses a special lens to help focus the laser. You may see bright flashes and hear soft clicking sounds. Most people feel little to no pain, but mild pressure can happen. Afterward, vision can be a bit blurry for a short time because of drops and temporary floaters.

Recovery and Follow-Up

Many people return to normal routines the same day, but follow your clinic's guidance. Your doctor may check eye pressure soon after the laser and again at follow-up. Floaters can appear after treatment and often fade or become less noticeable. If your vision does not improve as expected, your doctor may recheck the eye to confirm healing and rule out other causes.

Risks and When to Get Urgent Care

Possible risks include a short-term pressure rise, inflammation, and new floaters. More serious issues are uncommon, but they can happen. Seek urgent care if you get flashes of light, a sudden shower of floaters, a curtain-like shadow, or a sudden drop in vision. Those symptoms need a prompt eye exam.

FAQs on YAG Laser

Why would I need a YAG laser after cataract surgery?

Some people develop clouding of the capsule behind the lens implant, which can make vision blurry again. A YAG capsulotomy opens that cloudy area so light can pass through clearly. It is a common follow-up treatment.

Is a YAG laser the same as LASIK?

No. LASIK reshapes the cornea to correct focus. A YAG laser makes a small opening in a specific tissue structure to treat a separate problem.

Will I see floaters after YAG treatment?

Some people notice floaters temporarily, especially right after the procedure. They often fade or become less noticeable with time. If floaters suddenly increase or you see flashes, contact your eye doctor promptly.

How soon will vision improve?

Some people notice improvement the same day, while others take a day or two. Drops and mild inflammation can blur vision briefly. If clarity does not improve, follow up with your clinic.

References

YAG Laser Capsulotomy (Posterior Capsulotomy). Cleveland Clinic. https://my.clevelandclinic.org/health/procedures/yag-laser-capsulotomy-posterior-capsulotomy. Date Accessed February 11, 2026.

Posterior Capsule Opacification. EyeWiki (American Academy of Ophthalmology). https://eyewiki.org/Posterior_Capsule_Opacification. Date Accessed February 11, 2026.

Lasers (surgery). EyeWiki (American Academy of Ophthalmology). https://eyewiki.org/Lasers_(surgery). Date Accessed February 11, 2026.

Laser Principles in Ophthalmology. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK582153/. Date Accessed February 11, 2026.

An Overview of Nd:YAG Laser Capsulotomy. Medical Hypothesis, Discovery & Innovation in Ophthalmology (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC4346677/. Date Accessed February 11, 2026.

Retinal Detachment. National Eye Institute. https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/retinal-detachment. Date Accessed February 11, 2026.