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01

What is glaucoma?

Glaucoma is a progressive disease of the optic nerve that can gradually narrow your field of vision, damage the optic nerve, and cause permanent sight loss that cannot be restored by treatment.

Since the disease often progresses without symptoms, glaucoma is also known as the “silent thief of sight.”

The main risk factor for the development of glaucoma is elevated intraocular pressure, although its value alone does not necessarily indicate the presence of the disease. Normal intraocular pressure values are 10-21 mmHg, but glaucoma can develop even with normal values if there is optic nerve damage and changes in the visual field.

Therefore, glaucoma is considered a complex disease that cannot be diagnosed based on a single finding, but rather by evaluating multiple clinical indicators.

Glaucoma is one of the leading causes of blindness worldwide.

It is estimated to affect 2-3% of individuals over 40 years of age, with a large number of cases remaining undetected. Early detection and regular check-ups are crucial for slowing down the disease and preserving vision.

Prof. Smiljka Popović Suić, MD, PhD

Morena Gavrić, MD

There are several forms of glaucoma.

The most common is open-angle glaucoma, which occurs due to a gradual slowing of the outflow of aqueous humor. This causes fluid to remain in the eye longer than it should, which can lead to elevated intraocular pressure and optic nerve damage.

In angle-closure glaucoma, the cause lies in a drainage angle that is anatomically narrow or completely closed, which significantly restricts the outflow of aqueous humor.

Infantile glaucoma occurs in childhood, while secondary glaucoma develops as a consequence of other conditions, such as eye injuries, inflammation, long-term corticosteroid use, or other eye diseases.

For glaucoma treatment, painless outpatient laser procedures are available, including YAG laser iridotomy, selective laser trabeculoplasty (SLT), and pattern laser trabeculoplasty (PLT), performed with the modern Pascal laser. Surgical treatment includes trabeculectomy and the implantation of an Ex-PRESS mini glaucoma shunt for aqueous humor drainage and lowering intraocular pressure.

These procedures help reduce intraocular pressure and prevent further optic nerve damage, thereby slowing or stopping disease progression and preserving vision.

02

Is this procedure for me?

In its early stages, glaucoma most often causes no symptoms, which is why the disease is often detected only after optic nerve damage has occurred.

Open-angle glaucoma usually progresses slowly and without discomfort, while angle-closure glaucoma can cause sudden and severe symptoms, such as intense eye pain, sudden vision loss, headaches, nausea, and vomiting.

Glaucoma treatment depends on the type and stage of the disease and individual eye characteristics. The goal of every form of treatment is to lower intraocular pressure, preserve the optic nerve, and prevent further vision loss. The ophthalmologist makes the decision on the most appropriate treatment method after a detailed examination and diagnostic workup.

The procedure may be a good choice if:

You have elevated intraocular pressure that cannot be sufficiently controlled with drops

Glaucoma is progressing despite regular therapy

You experience side effects or difficulties using eye drops

You want a more long-term solution for controlling intraocular pressure

You have been diagnosed with a form of glaucoma suitable for laser or surgical treatment

You want to slow down the progression of glaucoma

Individuals over 45 years of age have a higher risk of developing glaucoma, especially if there is a family history of the disease.

Additional risk factors include high myopia, elevated blood pressure, diabetes, thyroid disorders, long-term corticosteroid use, previous eye injuries, and certain anatomical peculiarities of the eye.

03

Glaucoma examination

Although glaucoma cannot always be prevented, its progression can be significantly slowed down with timely detection and treatment.

Regular ophthalmological examinations are important for early detection of the disease, especially in individuals with increased risk.

Examinations are recommended every 2-4 years from the age of 40, and if you are over 65, check your eye pressure every one to two years. Individuals with a family history of glaucoma should begin examinations earlier and have them more often. For individuals already diagnosed with glaucoma, regular check-ups are necessary according to the ophthalmologist’s recommendation and adherence to prescribed therapy.

The examination includes:

Visual acuity check and intraocular pressure measurement

Visual field determination

Measurement of corneal thickness (pachymetry)

Examination of the drainage angle (gonioscopy)

Optic nerve analysis using optical coherence tomography (OCT)

Course of the examination

The examination begins with a consultation with the doctor during which information about symptoms, general health status, and any family history of eye diseases is collected. This is followed by a visual acuity check and an eye examination with a biomicroscope.

The next step is visual field analysis. The procedure is completely painless but requires
good concentration and can take longer, depending on patient cooperation.

After the visual field examination, intraocular pressure is measured. Anesthetic drops are used for the procedure to ensure a comfortable and painless examination. The same drops are used during gonioscopy, an examination of the eye angle that helps determine the type of glaucoma.

If necessary, pupils are dilated with drops to allow a detailed examination of the optic nerve and macula. An important part of the diagnosis is also the OCT examination, which enables precise, fast, and non-invasive analysis of the optic nerve and detection of possible damage.

Due to pupil dilation, vision may be temporarily blurred for several hours after the examination, so we recommend that you do not drive yourself home afterwards.

04

Procedure and recovery

After the examination and analysis of all findings, the doctor recommends further treatment. Glaucoma therapy is aimed at lowering intraocular pressure and preserving the optic nerve, and the choice of method depends on the type and stage of the disease. Medical, laser, and surgical methods are used in treatment today, which are safe, effective, and tailored to each patient.

Treatment Methods and Advantages

Depending on the clinical picture, treatment may include:

Anti-glaucoma eye drops

  • easy to apply
  • effectively lower intraocular pressure
  • slow down disease progression

Laser methods

  • YAG laser iridotomy – a fast and effective solution for acute angle-closure glaucoma and a standard method for treating and preventing angle-closure glaucoma
  • Selective Laser Trabeculoplasty (SLT, Ellex) – a non-invasive and painless method that improves aqueous humor outflow in open-angle glaucoma
  • PLT (Pascal) laser trabeculoplasty – a more modern, comfortable, and effective version of SLT

Surgical methods

  • Trabeculectomy – creates a new channel for aqueous humor outflow, reduces intraocular pressure, and stabilizes the disease state
  • Ex-PRESS mini glaucoma shunt – a drainage implant that allows for a simpler procedure and faster recovery

Recovery

Recovery depends on the type of procedure, but it is generally fast and without major limitations.

Eye Drops

Applied daily as directed by the doctor, the therapy is completely painless and non-invasive.

After Laser Procedures

The procedure is performed on an outpatient basis, under local anesthesia, lasts only a few minutes, and is completely painless. The patient can return to daily activities immediately after the procedure and continue with eye drop therapy as recommended by the doctor.

After Surgical Procedure

The surgery is performed under local anesthesia and lasts 20 to 30 minutes, after which the patient goes home the same day, with regular intraocular pressure checks and adherence to the doctor's instructions for the most successful recovery.

05

Your medical team – our physicians

06

Frequently Asked Questions

What is glaucoma?

Glaucoma is a progressive disease of the optic nerve which, if left untreated, can lead to narrowing of the visual field, degeneration of the optic nerve, and significant, even permanent, vision loss.

Why is glaucoma called the “silent thief of sight”?

It comes without symptoms, which is why it’s called the “silent thief” or “silent killer” of sight.

What causes glaucoma?

Elevated intraocular pressure is considered the main risk factor for the development of glaucoma.

What are normal intraocular pressure values?

Normal intraocular pressure (IOP) values are 10-21 mmHg. Some statistics indicate the upper normal limit can be 22 mmHg or even 24 mmHg.

Does every person with elevated intraocular pressure have glaucoma?

Not every instance of elevated intraocular pressure necessarily indicates glaucoma.

Can changes to the optic nerve and visual field occur at normal and low intraocular pressure values?

Changes to the optic nerve and visual field can occur at both normal and low intraocular pressure values. In such cases, we refer to normotensive and hypotensive glaucoma.

What are the risk factors for glaucoma?

Risk factors may include: age over 45 years, family history of glaucoma, high myopia, elevated blood pressure, thyroid disorders, diabetes, long-term corticosteroid use, eye injuries, and a higher incidence among people of African descent due to anatomical characteristics of the eye.

What do glaucoma symptoms depend on?

Glaucoma symptoms depend on the stage and type of the disease and can remain unrecognized for a long time. Unfortunately, advanced glaucomatous damage is often discovered in everyday practice without the person having noticed any symptoms.

What are the basic types of glaucoma?

The types of glaucoma are: open-angle glaucoma, angle-closure glaucoma, infantile glaucoma, and secondary glaucoma.

Are there symptoms of open-angle glaucoma?

Symptoms are typically absent in open-angle glaucoma. Patients often present only after optic nerve damage and visual field changes have already occurred.

Are there symptoms of angle-closure glaucoma?

Symptoms of angle-closure glaucoma can be very severe. They manifest as extremely high intraocular pressure, a significant decrease in visual acuity, ocular pain, headaches, nausea, and vomiting.

What is open-angle glaucoma?

Open-angle glaucoma is a type of glaucoma with an unknown cause. The structures of the eye’s angle through which the aqueous humor drains appear normal, but despite this, the flow of aqueous humor is slowed, and it remains in the eye longer than it should, leading to an increase in intraocular pressure. If left untreated, it presses on and damages the optic nerve.

What is angle-closure glaucoma?

Angle-closure glaucoma is a form of glaucoma whose cause lies in the anatomical structure of the drainage angle, which is narrow or completely closed, thereby significantly impeding the outflow of aqueous humor and damaging the optic nerve.

What is infantile (childhood) glaucoma?

Infantile (childhood) glaucoma is a form of glaucoma that can occur at birth (congenital glaucoma) or between the ages of three and sixteen (juvenile glaucoma). It often has a poorer prognosis than glaucoma that occurs in adults.

What is secondary glaucoma?

Secondary glaucoma is a form of glaucoma that can develop following eye surgery, ocular injury, recurrent complicated eye inflammations, prolonged corticosteroid use, systemic diseases such as diabetes, or cataracts.

Is glaucoma prevention possible?

Glaucoma prevention is not possible, but early detection of the disease and significantly slowing its progression are achievable.

How can glaucoma be slowed down?

If someone in your family has glaucoma, you should periodically undergo a complete glaucoma examination. If you are over 65 years old, it would be advisable to check your eye pressure every one to two years, even if you do not experience any symptoms. If the disease has already been diagnosed, it is necessary to attend regular check-ups and take the prescribed therapy regularly.

How is glaucoma treated?

Damage caused by glaucoma to the optic nerve before treatment begins cannot be reversed, but it is possible to maintain the current condition and significantly slow the progression of the disease. Depending on the situation, glaucoma can be treated with anti-glaucoma eye drops, laser therapy, or surgery. A combination of these methods is also possible.

How does glaucoma treatment usually begin?

Glaucoma treatment usually begins with anti-glaucoma eye drops that work to lower intraocular pressure.

What are the laser treatment methods for glaucoma?

Laser treatment methods for glaucoma include: YAG laser iridotomy, selective laser trabeculoplasty (Ellex), PLT Pattern laser trabeculoplasty (Pascal).

When is YAG laser iridotomy performed?

YAG laser iridotomy is performed in cases of acute angle-closure glaucoma.

When is selective laser trabeculoplasty (Ellex) applied?

It is applied in the treatment of open-angle glaucoma and aims to improve the drainage of aqueous humor through the eye’s angle. It is done in the clinic, takes only a few minutes, and is safe. It is not painful and is performed under topical anesthetic drops. The patient can go home immediately after the procedure.

When is PLT pattern laser trabeculoplasty (Pascal) performed?

PLT Pattern Laser Trabeculoplasty (Pascal) – similar to SLT, but the latest, even more comfortable and effective procedure, utilizing the most advanced Pascal laser currently available.

How is laser glaucoma treatment performed?

Laser glaucoma treatment is performed under local anesthesia on an outpatient basis. The procedure itself is painless, takes several minutes, and the patient goes home immediately.

What should I do after a laser procedure?

After a laser procedure, the patient can immediately return to their regular activities and should follow the prescribed eye drop therapy as recommended by the physician.

What are the surgical treatment methods for glaucoma?

Surgical treatment of glaucoma is performed through trabeculectomy (conventional filtration surgery) and implantation of an Ex-PRESS mini glaucoma shunt (drainage implant). The first method creates a new channel for aqueous humor drainage, while the second involves implanting a special tube (drainage implant).

How is glaucoma treated surgically?

Glaucoma surgery is performed under local anesthesia. The procedure itself takes twenty to thirty minutes and is painless. After the procedure, the patient can go home the same day.

Will I need to use anti-glaucoma drops for life?

For most individuals with glaucoma, anti-glaucoma eye drops therapy is long-term, often lifelong.

Do I still require anti-glaucoma therapy after glaucoma surgery?

It depends on the success of the surgery and the type of glaucoma. It may be necessary for a period, and occasionally long-term.

Can patients with glaucoma undergo cataract surgery?

Yes, patients with glaucoma can undergo cataract surgery, and it is a very common and safe combined procedure. For some patients, cataract surgery leads to a decrease in intraocular pressure.

Can patients with glaucoma undergo laser vision correction?

Glaucoma is not a contraindication for laser vision correction. It is important that the glaucoma is detected early and is stable, that the optic nerve is not significantly damaged, that intraocular pressure is well controlled, and that an ophthalmologist assesses the risk as low.

What is a visual field test used for?

A visual field test is used to indirectly determine the functioning of the optic nerve and retina. We examine the function of the retina and optic nerve to identify any damage.

How long does a visual field test take?

A visual field test takes approximately 10 to 20 minutes per eye.

How to lower eye pressure?

Eye pressure is most often lowered with physician-prescribed eye drops, and if necessary, by laser or surgery.