Part 3 | Glaucoma Treatment Options: Eye Drops, Laser Procedures, and Surgery

Glaucoma is a group of eye diseases that can damage the optic nerve, often related to eye pressure that is too high for that particular eye. The goal of glaucoma treatment is usually to lower eye pressure and slow or prevent further vision loss. Glaucoma damage cannot usually be reversed, which is why early diagnosis, routine monitoring, and consistent treatment are so important. The main treatment options include prescription eye drops, laser treatment, and surgery.

Doctor and patient in an eye clinic, discussing glaucoma treatment. Posters explain eye drops and early detection. Colors are blue and green.

Why Glaucoma Treatment Matters

Most people with glaucoma do not notice symptoms in the early stages. Vision loss can happen slowly and quietly, often affecting side vision first. By the time a patient notices changes, the disease may already be more advanced.

At OPT-ISM, glaucoma care may include checking eye pressure, evaluating the optic nerve, performing visual field testing, taking retinal or optic nerve images, and using OCT imaging to monitor for structural changes. These tests help determine whether treatment is needed, whether treatment is working, and whether the glaucoma is stable or progressing.

Infographic titled GLAUCOMA EYE DROP CHEAT SHEET with colored table of drop classes, eye diagrams, and clinical tips.

Glaucoma Eye Drops: The Most Common Starting Point

Prescription eye drops are one of the most common treatments for glaucoma. They work by either helping fluid drain out of the eye or reducing how much fluid the eye makes. Some patients only need one drop, while others may need multiple medications or a combination drop.

1. Prostaglandin Analogs

Prostaglandin analogs are commonly used as a first-line glaucoma drop. These drops help increase fluid drainage from the eye, which lowers eye pressure.

Common examples may include:

• Latanoprost

• Travoprost

• Bimatoprost

• Tafluprost

These are often used once daily, usually at night. Possible side effects can include eye redness, eyelash growth, darkening of the eyelid skin, or gradual darkening of the iris in some patients.

2. Beta Blocker Drops

Beta blocker drops lower eye pressure by reducing the amount of fluid the eye produces.

Common examples may include:

• Timolol

• Betaxolol

These drops may not be ideal for every patient, especially those with certain breathing conditions, heart rhythm problems, low heart rate, or other medical concerns. Patients should always tell their eye doctor and primary care doctor about their full medical history before starting glaucoma drops.

3. Alpha Agonist Drops

Alpha agonists can lower eye pressure by reducing fluid production and improving fluid drainage.

Common examples may include:

• Brimonidine

• Apraclonidine

Possible side effects may include redness, dryness, allergic-type irritation, fatigue, or dry mouth. Some patients develop sensitivity to these drops over time.

4. Carbonic Anhydrase Inhibitor Drops

Carbonic anhydrase inhibitor drops reduce fluid production inside the eye.

Common examples may include:

• Dorzolamide

• Brinzolamide

These drops are often used more than once per day. Some patients notice a bitter taste, stinging, or irritation after using them.

5. Rho Kinase Inhibitors

Rho kinase inhibitors are a newer class of glaucoma medication that help improve fluid outflow through the eye’s drainage system.

A common example is:

• Netarsudil

These drops may cause redness, mild irritation, or small changes on the surface of the cornea in some patients.

6. Combination Glaucoma Drops

Combination drops contain two glaucoma medications in one bottle. These can be helpful for patients who need more than one medication but want a simpler routine.

Examples may include combinations such as:

• Dorzolamide/timolol

• Brimonidine/timolol

• Brinzolamide/brimonidine

• Netarsudil/latanoprost

Combination drops can make treatment easier, but they still need to be used exactly as directed.

7. Nitric Oxide–Donating Prostaglandin Analog

Common drop:

• Latanoprostene bunod 0.024% — Vyzulta

Dual mechanism:

1. Latanoprost acid component increases uveoscleral outflow.

2. Nitric oxide–donating component relaxes the trabecular meshwork and Schlemm canal, improving conventional outflow.

When to use:

Good option for open-angle glaucoma or ocular hypertension, especially when you want a prostaglandin-type drop with added trabecular outflow support. It can be considered as first-line therapy or when switching from standard latanoprost/travoprost/bimatoprost is desired for additional IOP lowering.

Avoid / caution:

Similar cautions to prostaglandin analogs:

• Active intraocular inflammation or recurrent uveitis

• History of herpetic keratitis

• Aphakia/pseudophakia with CME risk

• Pregnancy caution

• Use caution with significant ocular surface sensitivity

Clinician pearls:

• Dose: 1 drop qhs.

• Do not dose more than once daily; prostaglandin-type drops generally do not work better with more frequent dosing.

• Side effects are similar to PGAs: conjunctival hyperemia, eyelash growth, iris/periocular pigmentation, irritation.

• The key teaching point is that it targets two outflow pathways: uveoscleral + trabecular meshwork/Schlemm canal.

Why Taking Glaucoma Drops Correctly Is So Important

Glaucoma drops only work if they are used consistently. Missing doses can allow eye pressure to rise, which may increase the risk of optic nerve damage.

Helpful tips include:

• Use the drop at the same time every day.

• Do not stop drops unless your eye doctor tells you to.

• Wait several minutes between different eye drops.

• Tell your doctor if the drops burn, cause redness, are too expensive, or are difficult to use.

• Ask about preservative-free options if irritation or dry eye is a problem.

Patients should not assume that discomfort means they should stop the medication. Often, the treatment plan can be adjusted.

Infographic titled OPT-ISM Eye Care Blog: Glaucoma Treatment Options, showing eye drops, laser, surgery, and monitoring icons.

Laser Treatment for Glaucoma

Laser treatment may be recommended when drops are not lowering pressure enough, when patients have trouble tolerating drops, or when a doctor feels laser is a good early treatment option. The National Eye Institute notes that many patients may still need glaucoma medicine even after laser treatment.

Selective Laser Trabeculoplasty, or SLT

SLT is commonly used for open-angle glaucoma. The laser is applied to the eye’s drainage tissue to help fluid drain more effectively and lower eye pressure.

SLT is usually performed in an eye doctor’s office or surgical setting. It does not involve cutting into the eye. The pressure-lowering effect can vary from person to person, and the effect may decrease over time.

Laser Peripheral Iridotomy, or LPI

LPI is used for certain patients with narrow angles or angle-closure risk. The laser creates a tiny opening in the iris to help fluid move more freely and reduce the risk of sudden angle closure. Glaucoma Research Foundation describes laser peripheral iridotomy as a standard first-line treatment for closed-angle glaucoma and eyes at risk for this condition.

This treatment is different from SLT. SLT is usually for open-angle glaucoma, while LPI is typically used for narrow-angle or angle-closure concerns.

Cyclophotocoagulation, or CPC

CPC is a laser procedure that targets the part of the eye that produces fluid. It is often considered in more advanced or difficult-to-control glaucoma cases. It may be used when other treatments are not enough or when other surgeries are not ideal.

Surgical Treatment Options for Glaucoma

Surgery may be recommended when eye drops and laser treatment are not enough to control eye pressure, or when glaucoma is progressing despite treatment. The goal of surgery is to create a better way for fluid to leave the eye and lower pressure.

MIGS: Minimally Invasive Glaucoma Surgery

MIGS stands for minimally invasive glaucoma surgery. These procedures use small devices, small openings, or less invasive techniques to improve fluid drainage and reduce eye pressure. MIGS is often used for mild to moderate glaucoma and is commonly performed at the same time as cataract surgery.

MIGS may help reduce the need for glaucoma drops, but it does not always eliminate drops completely. It is generally not designed to lower pressure as aggressively as traditional glaucoma surgeries.

Trabeculectomy

Trabeculectomy is a more traditional glaucoma surgery. It creates a new drainage pathway so fluid can leave the eye and lower pressure.

This procedure is often considered for more advanced glaucoma or when lower target pressures are needed. Because it is more invasive than drops, laser, or MIGS, it requires careful follow-up after surgery.

Tube Shunt or Glaucoma Drainage Implant

A tube shunt, also called a glaucoma drainage implant, uses a small tube and plate to help drain fluid from the eye. This may be recommended for certain types of glaucoma, advanced glaucoma, or eyes where other procedures are less likely to work.

Cataract Surgery and Glaucoma

In some patients, cataract surgery may help lower eye pressure. In others, cataract surgery may be combined with a MIGS procedure to improve pressure control and possibly reduce the number of glaucoma drops needed.

This depends on the type of glaucoma, the anatomy of the eye, the pressure goal, and the health of the optic nerve.

How Doctors Choose the Best Glaucoma Treatment

There is no single glaucoma treatment that is right for every patient. Your eye doctor may consider:

• The type of glaucoma

• Your eye pressure

• The appearance of the optic nerve

• OCT and visual field results

• How fast the glaucoma is changing

• Other eye conditions, such as cataracts or dry eye

• Your medical history

• Cost and insurance coverage

• Whether you can use drops consistently

• Side effects or allergies to medications

Some patients do well with one nightly drop. Others may need multiple drops, laser treatment, surgery, or a combination of treatments.

Glaucoma Follow-Up and Monitoring

Treatment is only one part of glaucoma care. Monitoring is just as important. Even if eye pressure looks good, your eye doctor may still need to follow the optic nerve, retinal nerve fiber layer, and visual field over time.

Glaucoma follow-up may include:

• Eye pressure checks

• Dilated eye exams

• Optic nerve evaluation

• OCT imaging

• Visual field testing

• Gonioscopy to evaluate the drainage angle

• Medication review

These visits help determine whether the current treatment is protecting the optic nerve.

When to Call Your Eye Doctor

Patients being treated for glaucoma should contact their eye doctor if they experience:

• Sudden eye pain

• Sudden blurry vision

• Halos around lights

• Nausea or vomiting with eye pain

• Severe redness

• New vision loss

• Trouble tolerating glaucoma drops

• Difficulty affording or using medications

Sudden eye pain, halos, nausea, and blurred vision can be signs of an urgent eye pressure problem and should not be ignored.

Final Thoughts

Glaucoma treatment has many options, including prescription eye drops, laser procedures, minimally invasive glaucoma surgery, and traditional glaucoma surgery. The best treatment depends on the type of glaucoma, the pressure goal, the health of the optic nerve, and the patient’s ability to stay consistent with treatment.

At OPT-ISM, glaucoma care focuses on early detection, careful monitoring, and personalized treatment planning. If you have high eye pressure, a family history of glaucoma, suspicious optic nerves, or changes on glaucoma testing, a comprehensive eye exam can help determine the next step.