Iridotomy and Laser Iridotomy: Procedure, Effects, and Risks of Laser Iridotomy and YAG Iridotomy

If left untreated, elevated intraocular pressure can lead to damage to the optic nerve. The consequences include blind spots in the visual field and a decline in visual acuity. Without treatment, glaucoma leads to complete blindness in the affected eye.

Laser iridotomy creates a small hole in the iris to directly connect the posterior and anterior chambers of the eye. This allows fluids, such as aqueous humor, to drain easily from the posterior to the anterior chamber of the eye. Doctors can thus prevent or limit symptoms and long-term complications such as angle-closure glaucoma. The patient does not feel the hole created by laser iridotomy in the eye. It causes no discomfort.

As a result, laser iridotomy is a targeted preventive measure for patients with a shallow anterior chamber, severe hyperopia, and the associated increased intraocular pressure. Doctors typically perform laser iridotomy on an outpatient basis under local anesthesia. It is painless and carries few risks or side effects. Surgical opening of the eyeball is not part of the laser iridotomy procedure and is rarely necessary.

Other indications for laser iridotomy include:

• Eyes with an extremely shallow anterior chamber (in cases of hyperopia or cataracts)
• Adhesions (synechiae) in and on the iris

If left untreated, both of these conditions can lead to a glaucoma attack, as pressure inside the eye rises. Laser iridotomy can also be helpful for other eye conditions that cause increased intraocular pressure.

In Germany, an estimated 10 million people suffer from cataracts.

In Germany, an estimated 10 million people suffer from cataracts @ New Africa /AdobeStock

Before laser iridotomy, a thorough preliminary examination is conducted by an ophthalmologist to accurately assess the eye and any potential eye conditions. During this examination, the ophthalmologist measures intraocular pressure and examines the anterior chamber angle as well as the anterior structures of the eye to detect narrow-angle glaucoma or a risk of a glaucoma attack at an early stage. This phase is crucial for the patient, as it is the only way to determine whether iridotomy or an alternative iridectomy is appropriate. Using modern laser technology and diagnostic procedures from ophthalmology, the eye is examined in detail, particularly the iris and the iris membrane.

During preparation, eye drops are often used to specifically constrict or dilate the pupil, allowing for a better assessment of aqueous humor outflow. In some cases, initial treatment for elevated intraocular pressure is performed before the procedure to stabilize the intraocular pressure. The patient is given a comprehensive explanation of the procedure, possible side effects, and any potential complications. The effectiveness of laser iridotomy and how it helps prevent damage to the optic nerve and complete blindness are also discussed.

Before the actual procedure, the eye is numbed with a local anesthetic, allowing the procedure to be performed on an outpatient basis under local anesthesia. The patient is given a local anesthetic to ensure the procedure is virtually pain-free. The use of a special contact lens allows the YAG laser to be precisely aimed at the iris to create a tiny hole in it. This hole improves the flow of aqueous humor between the posterior and anterior chambers of the eye and prevents intraocular pressure from rising further.

This procedure is particularly important for patients with extremely shallow eyes or those who already have elevated intraocular pressure, as untreated glaucoma can lead to complete blindness. Laser iridotomy addresses this very issue by facilitating the natural drainage of aqueous humor, thereby significantly reducing the risk of a glaucoma attack. In rare cases, adhesions, inflammation, or infections may occur, which is why careful postoperative care and regular follow-up examinations are necessary. Overall, modern techniques demonstrate that YAG iridotomy is an effective and safe solution for regulating intraocular pressure over the long term and preventing vision loss.

During laser iridotomy, the doctor first anesthetizes the patient’s eye with eye drops. In rare cases (or if the patient specifically requests it), the procedure can also be performed under general anesthesia.

In this case, the patient must first check with their health insurance provider to see if they will cover the costs of general anesthesia. The procedure requires the pupil to be constricted, which doctors can achieve using special eye drops.

For safety reasons, a chin rest is used to stabilize the patient. Next, a special contact lens (similar to a regular contact lens) is placed on the eye. A YAG laser then creates a tiny hole through the protective and conductive lens.

This creates a direct connection between the posterior and anterior chambers of the eye. The laser precisely vaporizes the targeted tissue areas. The surrounding tissue is not damaged during laser iridotomy.

The laser iridotomy itself takes only a few minutes. Including the preparations, the procedure is completed in half an hour. Before the actual procedure begins, the patient is given eye drops for local anesthesia @ VICTOR TORRES/Stocksy /AdobeStock

After the treatment, the patient should rest for about three hours due to the medication. Only then may they drive again.

If they are accompanied by someone, they can leave the office or clinic immediately after the procedure.

The anesthesia, which is necessary to place the contact lens directly on the cornea, lasts about ten minutes. Under certain circumstances, the doctor may extend the duration of the anesthesia.

Since the patient feels nothing, you, as the accompanying person, must ensure that they do not touch their eye. The lack of pain sensation can lead to serious eye injuries.

The following side effects are known:

• A temporary further increase in intraocular pressure, irritation of the eye’s surface, and mild inflammation. These complications can be treated effectively and quickly. They often subside within a short time.
• In addition, bleeding may occur in the anterior chamber of the eye, which rarely requires medical treatment.
• In extremely rare cases, laser iridotomy can cause damage to the lens or cornea. A doctor should examine these in any case. However, they can usually be treated easily with ointments and eye drops.

Laser iridotomy typically does not require extensive follow-up care, as it is relatively painless and low-risk.

In some cases, laser iridotomy may need to be repeated several times, as the holes can close up again quickly. For a few weeks after the procedure, the patient should rest their eyes and avoid direct sunlight and strenuous physical activity. 

In the first few days, you should not overdo it when watching TV or working on the computer. As with reading, you should definitely take breaks if you notice that your eyes are becoming strained. If you experience excessive or prolonged discomfort or pain, you should consult your treating physician immediately.

Laser iridotomy specifically addresses problems that lead to elevated intraocular pressure and is considered an effective procedure in modern ophthalmology. During iridotomy, a small hole is created in the iris using a laser, which improves the drainage of aqueous humor between the posterior and anterior chambers of the eye. This laser iridotomy is performed on an outpatient basis under local anesthesia, so patients generally tolerate the procedure well. YAG iridotomy can be particularly helpful in cases of angle-closure glaucoma to permanently regulate intraocular pressure and prevent a glaucoma attack. By precisely regulating the flow of aqueous humor, the risk of damage to the optic nerve—which could otherwise lead to complete blindness—is significantly reduced.

During the procedure, the ophthalmologist uses modern laser technology, such as the YAG laser, and a special contact lens to precisely treat the iris. The procedure is considered effective and safe; however, side effects such as mild inflammation or, in rare cases, complications may occur. Careful postoperative care with eye drops is therefore important to prevent inflammation or infection and to detect potential complications early. Regular follow-up examinations with an ophthalmologist support optimal healing and stabilization of intraocular pressure.

Iridotomy is particularly beneficial for patients with extremely shallow eyes or a narrow anterior chamber angle, as intraocular pressure can rise rapidly in these cases. This procedure is also an important treatment for elevated intraocular pressure in eye conditions such as glaucoma. Overall, modern procedures such as laser iridotomy have proven to be a safe and sustainable solution for preserving vision and preventing long-term vision loss.