Understanding Glaucoma: Causes, Symptoms, Diagnosis, and Treatment Options

Creator: Doctronic
Published: 2023-07-04

Key Takeaways

Normal eye pressure ranges from 12-22 mmHg, but optic nerve damage can occur even within this range—some patients develop damage at 15 mmHg while others tolerate pressures above 25 mmHg without harm.
Open-angle glaucoma affects 90% of cases and progresses silently over years, while acute angle-closure creates a medical emergency with severe eye pain, rainbow halos around lights, and vomiting requiring treatment within hours.
African Americans are 6-8 times more likely to develop the condition than Caucasians, with onset typically 10 years earlier, while those with diabetes face double the risk compared to non-diabetics.
First-line treatment prostaglandin eye drops like latanoprost reduce pressure by 25-30% when used nightly, though they may cause eyelash growth and iris color changes as permanent side effects.
Comprehensive dilated eye exams can detect optic nerve changes up to 6 years before patients notice vision loss, making annual screening critical for anyone over 60 or high-risk individuals over 40.

Glaucoma is an eye condition that damages the optic nerve, which is responsible for sending images from the eye to the brain. It usually occurs when fluid builds up in the eye, increasing the pressure inside the eye (intraocular pressure). If left untreated, glaucoma can lead to permanent vision loss or even blindness.

Glaucoma is often called the "sneak thief of vision" because it rarely causes symptoms in its early stages. That's why regular eye exams are crucial for early detection and treatment.

Causes and Risk Factors

The exact cause of glaucoma is not always known, but it can be inherited. Some factors that increase the risk of developing glaucoma include:

Being over 40 years old
Having a family history of glaucoma
Being of African American, Irish, Russian, Japanese, Hispanic, Inuit, or Scandinavian descent
Having certain medical conditions, such as diabetes, high blood pressure, or heart disease
Having had an eye injury or certain eye surgeries
Taking certain medications, such as corticosteroids

Symptoms of Glaucoma

Open-angle glaucoma, the most common type, usually has no symptoms in its early stages. As the condition progresses, people may experience a gradual loss of peripheral (side) vision.

Acute angle-closure glaucoma, a less common type, can cause sudden symptoms such as:

Severe eye pain
Headache
Nausea and vomiting
Blurred vision
Halos around lights
Redness in the eye

If you experience these symptoms, seek immediate medical attention, as this type of glaucoma is a medical emergency.

Understanding Glaucoma: Causes, Symptoms, Diagnosis, and Treatment Options

Diagnosing Glaucoma

Eye doctors use various tests to diagnose glaucoma, including:

Measuring eye pressure (tonometry)
Inspecting the drainage angle (gonioscopy)
Testing for optic nerve damage with imaging tests
Checking for vision loss (visual field test)
Measuring corneal thickness (pachymetry)

Treatment Options

Treatment for glaucoma aims to lower eye pressure and prevent further damage to the optic nerve. Options include:

Eye Drops

Prescription eye drops can lower eye pressure by reducing the amount of fluid produced in the eye or improving its drainage. It's essential to use these drops as directed by your doctor.

Oral Medications

In some cases, oral medications may be prescribed to lower eye pressure.

Laser Surgery

Laser procedures, such as trabeculoplasty, iridotomy, or cyclophotocoagulation, can improve fluid drainage or reduce fluid production.

Microsurgery

A trabeculectomy is a surgical procedure that creates a new channel for fluid to drain from the eye. This can lower eye pressure and help prevent further optic nerve damage.

Your eye doctor will work with you to develop an individualized treatment plan based on the type and severity of your glaucoma, as well as your overall health and preferences.

Living with Glaucoma

If you have glaucoma, it's essential to follow your treatment plan and have regular follow-up appointments with your eye doctor. Adopting a healthy lifestyle, including regular exercise and a nutrient-rich diet, can also help maintain your eye health.

Remember, early detection and treatment are key to preserving your vision. If you're at high risk for glaucoma, be sure to schedule comprehensive eye exams every 1-2 years.

For more information on glaucoma, visit:

The Bottom Line

This "silent thief of sight" often causes irreversible damage before symptoms appear, making regular eye pressure checks and optic nerve evaluations your best defense. Early detection combined with consistent pressure-lowering treatment can preserve vision for decades in most patients. If you're experiencing sudden eye pain, vision changes, or have concerns about your risk factors, Doctronic can help you understand your symptoms and next steps.