Glaucoma Laser Surgery

Treatment for Glaucoma

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What variations of glaucoma laser surgery are there?

Glaucoma is a disorder characterized by elevated pressure inside the eye that can cause damage to the optic nerve and vision loss. Glaucoma laser surgery is a term used to describe a group of operations that use laser technology to treat glaucoma. There are various glaucoma laser procedures, such as:

The most popular laser glaucoma surgery is called selective laser trabeculoplasty (SLT). It entails selecting and treating particular cells in the trabecular meshwork, which is in charge of removing fluid from the eye, with a low-energy laser. SLT promotes the outflow of fluid and lowers intraocular pressure by activating these cells.

SLT and Argon Laser Trabeculoplasty (ALT) are both laser procedures that focus on the trabecular meshwork. It enhances fluid outflow and lowers intraocular pressure by opening up the drainage pathways with a high-energy argon laser.

Narrow-angle glaucoma, also known as angle-closure glaucoma, is most commonly treated by laser peripheral iridotomy (LPI). By making a tiny hole in the iris with a laser during this surgery, fluid can easily flow between the anterior and posterior chambers of the eye. By doing so, pressure is reduced and angle closure is avoided.

Cyclophotocoagulation (CPC)

CPC is frequently used in severe glaucoma situations or when other therapies have failed. The ciliary body, which creates the aqueous humor fluid, is its intended target. CPC aids in reducing intraocular pressure by employing laser energy to eliminate or lessen the ciliary body’s capacity to generate fluid.

It’s crucial to remember that the particular sort of laser surgery that is advised for a person depends on a number of variables, including the type and severity of glaucoma as well as the patient’s general eye health. An ophthalmologist or glaucoma expert should select the operation after conducting a comprehensive evaluation and discussing all of the available choices.

Pros and Cons of Laser Surgery for Glaucoma

Glaucoma Laser Surgery

The benefits and drawbacks of each glaucoma laser surgery technique are as follows:

SLT (Selective Laser Trabeculoplasty):


  • Effective in many patients’ decreasing intraocular pressure (IOP).
  • Generally well-tolerated and less intrusive.
  • If necessary, repeatable technique.
  • Little possibility of problems.
  • Can be used as a stand-alone therapy or as a supplement to medicine.


  • Not always successful, especially in cases of severe glaucoma.
  • Immediately following the surgery, some individuals’ IOP may briefly rise.
  • It’s possible that the effects won’t last, and subsequent treatments might be required.

Argon Laser Trabeculoplasty (ALT)


  • Can significantly lower IOP in certain people.
  • Basic and relatively short process.
  • Can be used in situations where SLT is unavailable or inappropriate as an alternative to SLT.


  • A less frequent procedure than SLT.
  • Increased likelihood of problems including inflammation or scarring.
  • Compared to SLT, may not have as high a long-term success rate.
  • Recurring treatments could be required.

LPI: Laser Peripheral Iridotomy


  • Extremely successful in treating angle-closure or narrow-angle glaucoma.
  • Decreases the possibility of an abrupt angle closure by creating a new drainage pathway for fluid.
  • Can stop sudden glaucoma attacks and the resulting vision loss.


  • Not relevant to all glaucoma kinds.
  • Possible short-term negative effects, such as glare, haloes, or vision blur.
  • Exceptional consequences can include hemorrhage, infection, or harm to other eye components.

Cyclophotocoagulation (CPC):


  • Useful in cases of resistant or severe glaucoma.
  • Can lower IOP in people who have not responded well to previous therapies.
  • Offers flexibility by being executed in a variety of ways (endoscopic or transscleral).


  • Compared to other laser operations, there is a higher risk of complications.
  • Possible reduction in visual acuity or other problems with eyesight.
  • Possibility of requiring numerous treatments over time.
  • Unsuitable as a first line of treatment.

The advantages and disadvantages described here should be seen as generalizations; the appropriateness of each procedure will depend on the specifics of each patient. The best person to assess your unique condition and go over your treatment options is an ophthalmologist or glaucoma expert.

What is the recovery time of laser eye surgery for glaucoma?

Glaucoma Laser Surgery

The length of recovery following glaucoma laser surgery can change based on the patient and the precise technique done. Here is a summary of the anticipated healing times:

Selective Laser Trabeculoplasty (SLT)

Quick recovery: Most patients are able to get back to their regular routines right away.

First few hours following surgery: Mild discomfort or sensitivity to light may be felt.

Longer-term recovery: The eye pressure may take a few days to start dropping, and it may do so over the coming weeks.

Argon Laser Trabeculoplasty (ALT)

Quick recovery: Most patients can go back to their regular routines right after.

Initial post-procedure phase: For a few hours or days, you can have some minor discomfort, redness, or light sensitivity.

Longer-term recovery: Over the coming weeks, the eye pressure may progressively decrease.

Laser Peripheral Iridotomy (LPI): 

  1. Quick recovery: Most patients are able to get back to their regular routines right away.
  2. Initial post-procedure period: For a few days, there may be some little discomfort, light sensitivity, or blurred vision.
  3. Longer-term recovery: After the surgery, the eye should gradually get used to its new drainage pattern.

Cyclophotocoagulation (CPC): 

  1. Quick recovery: Most patients are able to get back to their regular routines in a day or two.
  2. Initial postoperative phase: For a few days, there may be some minor discomfort, redness, or light sensitivity.
  3. Longer-term recovery: Although many treatments might be necessary, the ocular pressure should gradually decrease over time.

It’s crucial to adhere to your doctor’s post-operative instructions, which may include using the recommended eye drops, staying away from physically demanding activities, and scheduling follow-up appointments. Individual experiences and recovery timeframes can vary. Based on your particular circumstances, your ophthalmologist or glaucoma expert can offer more detailed information.

What to expect during each procedure?

What to anticipate usually from each glaucoma laser surgery operation is as follows:

Selective Laser Trabeculoplasty (SLT): 

The eye will be numbed with eye drops prior to the treatment, and the doctor may give a light sedative if required.

During the treatment, a special lens will be placed on your eye to help focus the laser beam while you are seated at a laser machine. The trabecular meshwork within the eye will be the target of the laser treatment by the physician. Throughout the procedure, you can notice light flashes.

Time: Each eye takes about 10 to 15 minutes to complete the treatment.

Similar to SLT, eye drops will be used to numb your eye before Argon Laser Trabeculoplasty (ALT), and a sedative may be used if necessary.

The doctor will target the trabecular meshwork with a high-energy argon laser while you are seated in front of a laser equipment. Small burns or openings are made by the laser to facilitate fluid outflow.

Time: Each eye typically requires 10 to 15 minutes of ALT.

Eye drops will be used to numb your eye before the laser peripheral iridotomy (LPI) operation, and your pupil may be dilated.

A customized lens will be put on your eye while you are seated at a slit-lamp microscope for the process. To allow fluid to move between the eye’s chambers, the doctor will use a laser to make a tiny hole in the iris.

LPI normally just requires a few minutes per eye.

Cyclophotocoagulation (CPC):

Before the treatment, the eye will be numbed with eye drops, and a sedative may be administered. 

The ciliary body will be targeted and treated with laser energy throughout the treatment, which reduces the ciliary body’s capacity to create fluid and lowers eye pressure.

Duration: Depending on the precise technique employed, the time can vary, but it typically lasts between 10 and 30 minutes.

You might experience some moderate sensations throughout all of these treatments, such as warmth, light pressure, or tingling in the eye. You will be guided through the process by the doctor and other medical professionals, who will make sure you are secure and comfortable at all times.

Glaucoma laser surgery success rate

Depending on the precise method carried out, the stage of glaucoma, and unique patient characteristics, the success percentage of glaucoma laser surgery can change. It’s crucial to remember that success rates are often determined by how well a procedure lowers intraocular pressure (IOP) and slows or stops the disease’s progression.

An overview of the success rates for certain popular glaucoma laser procedures is provided below:

Selective Laser Trabeculoplasty (SLT)

Success rate: In roughly 75% to 80% of patients, SLT has successfully lowered IOP. However, the precise success percentage can change depending on elements like glaucoma severity and unique patient traits.

Argon Laser Trabeculoplasty (ALT)

Success rate: Between 60% and 70% of patients experienced IOP reduction after ALT. However, due to SLT’s equivalent effectiveness and lower risk of problems, ALT has generally been superseded as the recommended laser treatment.

Laser Peripheral Iridotomy (LPI)

Treatment of narrow-angle or angle-closure glaucoma is quite successful when using LPI. It relieves pressure by establishing a new drainage pathway, and its success rate is often high.

Cyclophotocoagulation (CPC)

Cyclophotocoagulation has a high percentage of success in decreasing IOP, especially when other therapies haven’t worked. Depending on the precise technique employed and the reaction of each patient, the success rate can range from 50% to 90%.

Glaucoma laser surgery cost

Glaucoma laser surgery cost

Glaucoma laser surgery costs can change depending on a number of variables, including the particular procedure carried out, the location, the healthcare provider, and the particular patient’s insurance coverage. It’s crucial to keep in mind that healthcare costs might fluctuate over time. For the most precise and recent information on costs, it is preferable to speak with your ophthalmologist or other healthcare practitioner.

Nevertheless, the following provides a basic sense of the cost range that each glaucoma laser surgery operation often has in the US without insurance coverage:

  • SLT (Selective Laser Trabeculoplasty): The price per eye might range from $1,000 to $2,500.
  • Argon Laser Trabeculoplasty (ALT): The price per eye might range from $500 to $2,000.
  • Laser Peripheral Iridotomy (LPI): The price per eye might range from $500 to $1,500.
  • Cyclophotocoagulation (CPC): The price per eye might range from $1,500 to $5,000.

It’s important to remember that these numbers are approximations and subject to wide variation. Additionally, the actual cost that patients pay out-of-pocket can be significantly impacted by insurance coverage and negotiated prices.

It is advised that you speak with your ophthalmologist or healthcare provider to obtain the most precise information possible about how much these operations will cost you in your particular circumstance. Based on your insurance coverage, geography, and unique circumstances, they can give you a more exact estimate.


Glaucoma, a disorder characterized by elevated intraocular pressure that may result in vision loss, can be effectively treated using laser surgery. Several advantages are provided by glaucoma laser procedures such as Selective Laser Trabeculoplasty (SLT), Argon Laser Trabeculoplasty (ALT), Laser Peripheral Iridotomy (LPI), and Cyclophotocoagulation (CPC). Many patients can successfully lower intraocular pressure with these procedures since they are typically minimally invasive, well-tolerated, and safe.

It’s important to keep in mind that the suitability and results of laser surgery depend on the individual’s unique condition as well as other factors. 

Although laser surgery for glaucoma can reduce high intraocular pressure, it’s important to note that the procedures might have drawbacks. Long-term success rates can vary, and some patients may need to have repeated treatments over time. Following post-operative instructions, showing up for follow-up appointments, and continuing with the recommended ongoing glaucoma management, as suggested by their healthcare professional, are essential for patients.

In the end, laser glaucoma surgery can be a useful and effective instrument in the all-encompassing care of the ailment. Patients can take proactive measures to preserve their eyesight and maintain their eye health by working closely with healthcare specialists to determine the best treatment options that are accessible to them.


For your glaucoma laser procedure, are you awake?

No one will see the opening because it is hidden beneath your eyelid. By allowing surplus fluid in your eye to drain away, this hole helps to reduce eye pressure. You will typically be awake during this procedure, but you will also be given numbing and relaxing medication.

What not to do following glaucoma laser eye surgery?

What must I abstain from following glaucoma surgery? It’s crucial to avoid bending over or engaging in intense activities like biking, jogging, upside-down yoga, or weight lifting while you’re recovering after laser eye surgery for glaucoma.

After glaucoma surgery, can you watch TV?

Within the first few days after surgery, the majority of patients are able to resume daily activities including reading, watching TV, and using phones, laptops, or other electronic devices. Bathing and showering can continue. To avoid bumping or rubbing the eyes, wear eye protection (a shield or glasses).

About the Author:
Dr Shaun Larsen

Dr Shaun Larsen

Dr. Shaun Larsen is an optometrist who specializes in low vision services and enhancing vision with contact lenses. He has a passion for making people's lives better by helping them see well enough to read, write, or drive again. He always keeps up with the latest technology so he can help people regain their independence.


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