Laser Iridotomy for Glaucoma: Procedure, Benefits and Recovery

Glaucoma is one of the leading causes of irreversible blindness in India, and early treatment is often the key to protecting vision. Many people diagnosed with narrow-angle glaucoma or at risk of angle-closure glaucoma are unsure about whether a laser-based treatment is safe, painful, or necessary. In this blog, you’ll learn everything about laser iridotomy, including how the procedure works, who needs it, benefits, risks, recovery tips, and more.

Why Glaucoma Needs Immediate Attention?

Glaucoma is often called the “silent thief of sight” because it can damage the optic nerve without obvious symptoms in the early stages. According to studies, millions are living with glaucoma, but nearly half remain undiagnosed.

One dangerous type is angle-closure glaucoma, in which the drainage angle in the eye becomes blocked. This causes a sudden rise in eye pressure that can permanently damage vision if not treated quickly.

This is where peripheral iridotomy becomes important. By relieving pupillary block, laser peripheral iridotomy can open the drainage angle and help lower eye pressure when angle closure is caused by this mechanism.

What is Laser Iridotomy?

Laser iridotomy is a minimally invasive eye procedure used to treat or prevent angle-closure glaucoma. In this treatment, an ophthalmologist uses a laser to create a tiny opening in the iris, the coloured part of the eye.

The opening creates an alternative pathway for aqueous humour to flow from the posterior chamber to the anterior chamber, helping relieve pupillary block and reduce the risk of angle-closure. This reduces intraocular pressure and lowers the risk of optic nerve damage.

The procedure is commonly recommended for:

• Narrow-angle glaucoma
• Angle-closure glaucoma
• People with anatomically narrow drainage angles
• Patients with high eye pressure due to blocked drainage
• Individuals with a strong family history of glaucoma

In India, specialists often recommend YAG peripheral iridotomy, where a YAG laser is used because it is highly precise and effective.

How is Laser Iridotomy Performed?

It is a quick and generally straightforward procedure performed by an eye specialist. Here’s a step-by-step breakdown of how it works:

1. Preparation: The doctor will apply anaesthetic eye drops to numb the eye before the procedure begins. Medications are also given to help reduce the size of the pupil.
2. Positioning: The patient sits at a slit-lamp machine (a special microscope with a light). A contact lens may be placed on the eye to help focus the laser.
3. Laser Application: Using a highly focused laser, the doctor makes a small opening in the iris, the coloured part of the eye. This new hole allows fluid to flow freely within the eye, helping to reduce internal pressure.
4. During the Procedure: The procedure itself only takes a few minutes. The patient might feel a brief sensation of discomfort or see flashes of light, but due to the anaesthetic, it is generally painless.
5. Post-Procedure: The doctor will check intraocular pressure to ensure the procedure was successful. Anti-inflammatory eye drops may be prescribed to control inflammation after the procedure.
6. Recovery: It’s normal to experience mild discomfort or blurred vision for a few hours. However, most patients can go home the same day.

Who is a Candidate for Laser Iridotomy?

Laser peripheral iridotomy is used when pupillary block contributes to angle closure. Depending on the severity and underlying mechanism, additional treatment may be required to control eye pressure and protect the optic nerve.  People who may benefit from this treatment include:

• Individuals diagnosed with narrow-angle glaucoma or at risk of angle closure
• Patients with elevated intraocular pressure that could lead to optic nerve damage
• Those with a family history of glaucoma or other risk factors
• Generally healthy adults, as certain health conditions may render a person unsuitable for glaucoma surgery
• Patients seeking an effective preventive measure against glaucoma progression

However, always consult an eye specialist to determine if laser peripheral iridotomy is the right option for your eye health.

Benefits of Laser Iridotomy

One reason why laser iridotomy is widely recommended is because it can prevent severe glaucoma complications without invasive surgery.

• Prevents optic nerve damage: Laser iridotomy helps reduce eye pressure, lowering the risk of permanent vision loss caused by glaucoma. 
• Minimally invasive procedure: No surgical cuts or stitches are involved, making it safer and less intimidating for patients.  
• Quick outpatient treatment: The procedure usually takes only a few minutes and does not require hospital admission.  
• Helps prevent angle-closure attacks: Creates a new pathway for fluid drainage, reducing the risk of sudden glaucoma emergencies.  
• Fast recovery time: Most patients can return to normal daily activities within 1–2 days.  
• Reduces intraocular pressure: Improves fluid circulation inside the eye to maintain healthier pressure levels.
• Painless or minimally uncomfortable: Anaesthetic eye drops help make the treatment comfortable for most patients. 
• Protects long-term vision: Early treatment with peripheral iridotomy can help preserve eyesight and slow glaucoma progression.  

What are the Risks and Side Effects of Laser Iridotomy?

Like any medical procedure, there are some risks and potential laser iridotomy side effects. These include:

• Mild discomfort: Some patients feel slight discomfort or eye pain after the procedure.
• Blurred vision: Temporary blurred vision is common but usually clears within a few hours.
• Light sensitivity: Some may experience sensitivity to light for a short time.
• Inflammation: Mild redness or inflammation may occur, but eye drops can help.
• Increased eye pressure: A temporary rise in eye pressure is rare but possible.

These issues are usually managed with medications and proper aftercare.

Laser Iridotomy Aftercare Tips You Should Follow

Proper laser iridotomy aftercare helps reduce discomfort and ensures smooth healing. Here are some tips:

• Use prescribed eye drops regularly: Helps reduce inflammation, prevent infection, and support healing after the laser iridotomy procedure.
• Avoid rubbing your eyes: Prevents irritation and protects the treated area from injury.
• Rest your eyes for a few hours: Allows the eye to recover from temporary light sensitivity or blurred vision.
• Avoid strenuous exercise for a few days: Heavy physical activity may temporarily increase eye pressure.
• Wear sunglasses outdoors: Helps manage glare and light sensitivity after laser iridotomy.
• Attend follow-up appointments: Enables the doctor to monitor eye pressure and ensure the iridotomy opening remains functional.
• Avoid dusty or smoky environments: Reduces the risk of eye irritation and discomfort during recovery.
• Watch for warning signs: Seek immediate medical care if you experience severe pain, sudden vision loss, nausea, or excessive redness.
• Resume screen time gradually: Helps reduce eye strain if vision feels slightly blurry initially.
• Follow your doctor’s medication schedule: Essential for effective laser iridotomy aftercare and long-term glaucoma management.