Dr Callahan is a true professional who takes the time to explain the results and answer questions. Highly recommend her for your eye needs!
Chip Brooks
YAG Laser Peripheral Iridotomy for Angle-Closure Glaucoma
Why YAG PI Is Often the Right Choice
For patients with narrow or closed angles, YAG PI offers meaningful, long-lasting protection with very little disruption to daily life. Understanding its advantages can help you feel confident in your care plan.
Unlike traditional surgical iridectomy (a procedure that requires making an incision in the eye), YAG PI uses only laser energy. There is no need for general anesthesia, no surgical incision, and no hospital stay. This significantly reduces the risk of infection and speeds up recovery.
An acute angle-closure attack is a sudden, severe rise in eye pressure that counts as a medical emergency. Without treatment, it can permanently damage vision within hours. YAG PI removes the structural blockage that causes these attacks, providing proactive protection for at-risk eyes.
In most cases, the opening created during YAG PI remains clear and functional for many years. Once it is confirmed open at your follow-up visit, most patients do not need the procedure repeated. Regular monitoring continues to ensure your eye pressure and angle status remain stable over time.
Preparing for Your YAG PI Appointment
Preparation for this procedure is simple and straightforward. Our team will walk you through everything you need to know in advance so you feel ready and comfortable on the day of treatment.
Before scheduling your YAG PI, you will have a comprehensive eye exam that includes a careful look at your drainage angles using a technique called gonioscopy, where a special lens is used to view the angle structures at the front of the eye. Your eye doctor will review your medical history, discuss any current medications, and confirm that this procedure is the right fit for you.
A few simple steps on the day of your appointment will help things go smoothly.
- Do not wear contact lenses to the appointment
- Eat a light meal beforehand, as fasting is not required
- Arrange for a trusted person to drive you home, since your vision may be temporarily blurry after the procedure
- Bring sunglasses, as your eyes may be sensitive to light afterward
- Continue your regular eye drops unless our team advises otherwise
Please let our team know about any blood thinners, aspirin, anti-inflammatory drugs, or other medications you take regularly. Also share any history of allergic reactions to eye drops or numbing medications. This information helps us prepare the right approach to keep you safe and comfortable throughout the visit.
What Happens During the Procedure
The entire YAG PI procedure takes only a few minutes and is performed right in our office. Knowing what to expect at each step can help ease any anxiety you may have.
When you arrive, anesthetic eye drops are applied to numb the surface of your eye. Your eye doctor may also use drops to make your pupil smaller, which helps position the iris for optimal laser placement. A small contact lens is then placed gently on your eye to stabilize it and help the laser focus precisely on the correct location.
Your eye doctor directs short pulses of laser energy to create the tiny opening in your iris. You may see bright flashes of light and feel a mild tapping sensation, but the procedure is not painful. Most treatments are completed in just a few minutes per eye.
After the laser is complete, you will rest briefly while our team checks your eye pressure to confirm it is at a safe level before you go home. Some mild blurriness or light sensitivity at this stage is normal and typically improves within a few hours.
Recovery and Aftercare
Most patients recover quickly and return to their normal routine within a day. Following the aftercare instructions our team provides helps your eyes heal well and lowers the chance of any complications.
Mild redness, light sensitivity, or slightly blurred vision are common in the first day or two after YAG PI. These symptoms usually resolve on their own. Avoid rubbing your eyes during this period, and use any prescribed anti-inflammatory drops exactly as directed.
A few simple habits will support your recovery at home.
- Use anti-inflammatory eye drops as prescribed by your eye doctor
- Wear sunglasses outdoors to shield your eyes from bright light
- Avoid heavy lifting, strenuous exercise, or bending over for the first day or two
- Limit extended screen time on the first day to allow your eyes to rest
While complications are uncommon, contact our office right away if you experience severe or worsening eye pain, a sudden drop in vision, increased redness, or any discharge from the eye. These are not typical and may indicate something that needs to be addressed promptly.
A follow-up visit is scheduled shortly after your procedure so our eye doctors can confirm the opening is clear and your eye pressure is well controlled. Additional monitoring visits are planned over the following months, because ongoing pressure checks and angle assessments are an essential part of managing your long-term glaucoma risk.
Risks and Possible Side Effects
YAG PI has a strong safety record, but as with any medical procedure, there are potential risks worth understanding. Our team will discuss these with you fully before your appointment.
Mild inflammation, brief light sensitivity, and a temporary feeling of pressure in the eye are the most frequently reported effects. These typically resolve within a few days, and anti-inflammatory drops help keep them manageable.
A small minority of patients may experience a brief spike in eye pressure immediately after the procedure, which is why we check your pressure before you leave. Very rarely, there may be minor bleeding inside the eye or a reaction in nearby eye structures. Serious complications are uncommon.
A small number of patients notice a faint line of light, a shadow, or a ghost image caused by light passing through the new laser opening. This is a recognized side effect that most people find fades with time or becomes less noticeable as the brain adapts.
In rare cases, the body's healing process can cause the laser-created opening to narrow or close again. If this happens, a repeat YAG PI can be performed to restore adequate fluid flow. Your follow-up visits are partly designed to catch this early if it occurs.
Frequently Asked Questions
These answers address practical questions that go beyond what is covered above, including guidance on decision-making and knowing when to seek care.
YAG PI treats the structural cause of angle-closure glaucoma, but it does not address all forms of elevated eye pressure. If you have open-angle glaucoma or elevated pressure unrelated to angle closure, you will likely continue your existing medication regimen. Our eye doctors will reassess your pressure at each follow-up and adjust your treatment plan based on those results.
Yes, in most cases YAG PI can be safely performed in an eye that has a cataract. However, when cataracts are advanced enough to significantly affect vision on their own, your eye doctor may recommend cataract surgery as the preferred approach, since removing the clouded lens often improves the drainage angle at the same time. The right choice depends on the specific condition of your eye.
If your eye doctor has identified narrow or closed angles and recommended YAG PI, declining treatment carries real risk. Without the procedure, you remain vulnerable to an acute angle-closure attack, which is a true eye emergency involving sudden severe pain, blurred vision, nausea, and rapidly rising eye pressure that can cause permanent vision loss within hours if not treated. If you are ever uncertain, discuss your concerns with our team rather than delaying care.
When performed for a medically necessary reason such as narrow angles or angle-closure glaucoma, YAG PI is typically covered by most major medical insurance plans, including Medicare. Your out-of-pocket costs will depend on your specific plan, including any applicable deductibles or copayments. Our team can help clarify your coverage details before your procedure.
If both of your eyes have narrow drainage angles, your eye doctor will likely recommend treating both, sometimes at separate appointments. Because the structural risk applies to each eye independently, treating both is the most thorough way to prevent angle-closure attacks from occurring in either eye. The decision is made based on the gonioscopy findings in each eye individually.
YAG PI is one component of glaucoma care at our practice, alongside Selective Laser Trabeculoplasty (SLT) for open-angle glaucoma and Minimally Invasive Glaucoma Surgery (MIGS), specifically goniotomy, for appropriate surgical candidates. Each treatment targets a different mechanism of pressure elevation. Your eye doctor will determine which combination of treatments and monitoring best fits your diagnosis and the current state of your eye health.
Protecting Your Vision at NewView Eye Center
Our team at NewView Eye Center is committed to giving every patient in Northern Virginia the personalized, expert eye care they deserve. Whether you have been diagnosed with angle-closure glaucoma or are simply being monitored for narrow angles, we are here to guide you through every step of your care with clarity and compassion. We encourage you to schedule an appointment so we can evaluate your eye health and help you protect the vision you depend on.
What our Patients Says
Explore More
Find more information about our doctors, services, and technology that keep your eyes healthy and your vision at its best.