Glaucoma refers to a group of eye diseases. These diseases are likely to damage the optic nerve located in your eye. It is triggered by the rising fluid pressure inside the eyes.
It leads to increased intraocular pressure (increasing the pressure inside the eyes).
Did you know that glaucoma affects around 3 million people in the United States? Additionally, it is among the main causes of blindness worldwide.
In the early stages of glaucoma, a person may not exhibit any symptoms.
But over time, it may lead to the loss of peripheral (side) vision. Glaucoma can make it seem like you're looking through a tunnel. Slowly, your straight-ahead vision might get worse until you can't see at all.
While there are two common types of glaucoma—Open-Angle and Angle-Closure- at least eight other types have been identified. In this blog, we will be walking through the types of glaucoma as well as their possible treatment with precautions. Let's get started.
Understanding the Different Types of Glaucoma
A category of eye disorders known as glaucoma harms the optic nerve, frequently as a result of elevated intraocular pressure or ocular hypertension. There are several types of glaucoma, and recognizing the differences between them can help with early detection and treatment.
(Also Read: Difference between Glaucoma and Cataracts)
Primary Open-Angle Glaucoma
This is by far the most common type, accounting for about 90% of cases.
Over time, the eye's natural drainage mechanism gradually loses its effectiveness in cases of open-angle glaucoma. This causes a gradual buildup of fluid, which raises intraocular pressure and damages the optic nerve. Regular eye exams are essential for early detection and effective management with medication or other treatments to preserve vision because it usually develops without any obvious symptoms.
Primary Angle-Closure Glaucoma
This kind of glaucoma, sometimes called narrow-angle glaucoma, develops when the iris and cornea's drainage angle in the eye becomes excessively small or obstructed. Eye pressure rises abruptly and sharply as a result of this obstruction.
This is a medical emergency that can cause severe eye pain, headache, nausea, and blurred vision.
To avoid irreversible eyesight loss, treatment must begin right away.
Normal-Tension Glaucoma
Even if eye pressure stays within the usual range in this type of glaucoma, damage is done to the optic nerve. Although the precise etiology is unknown, inadequate blood supply to the optic nerve may be a contributing factor. Similar to open-angle glaucoma, early symptoms are often absent, so regular checkups are important, especially if glaucoma runs in your family.
Secondary Glaucoma
This type of glaucoma develops as a consequence of another underlying eye condition, injury, or medical problem. It results in increased eye pressure, leading to optic nerve damage and vision issues. Causes can include eye trauma, inflammation, certain medications (like steroids), or other diseases. Several specific subtypes fall under secondary glaucoma:
Pigmentary Glaucoma:
This is a form of open-angle glaucoma where pigment flakes from the iris shed and clog the eye's drainage system, raising pressure. It's more common in younger adults and can be worsened by physical activity.
Exfoliative Glaucoma (Pseudoexfoliative Glaucoma):
This occurs when a flaky, white material accumulates on internal eye structures, blocking drainage and increasing eye pressure. It often leads to higher and more unpredictable eye pressures, frequently requiring more aggressive treatment.
Neovascular Glaucoma:
Characterized by abnormal new blood vessel growth on the iris and drainage system, which obstructs fluid outflow and elevates eye pressure. It's usually a complication of other medical conditions like diabetes or retinal vein blockages, and can be challenging to treat.
Uveitic Glaucoma:
This type is triggered by inflammation inside the eye (uveitis). The inflammation can directly block or damage the drainage system, or sometimes, the steroid medications used to treat uveitis can raise eye pressure. It's often unpredictable and requires careful management by an eye specialist.
Traumatic Glaucoma:
As the name suggests, this occurs following an eye injury, whether from blunt force or a penetrating wound. Glaucoma can appear immediately after the injury or even years later, often as a form of open-angle glaucoma. Early detection is key for management.
Congenital Glaucoma:
This rare type affects infants and young children. It happens when the eye's drainage system doesn't develop correctly before birth, causing fluid buildup and pressure that damages the optic nerve. Symptoms may include unusually large eyes, excessive tearing, cloudy corneas, and light sensitivity. It can be inherited and typically requires early surgery to prevent vision loss.
Who is Vulnerable to Glaucoma
Risk Factors for Glaucoma: Understanding your risk can help you take early action:
- Age over 60
- Family history of glaucoma
- High intraocular pressure
- Diabetes or hypertension
- Use of corticosteroids
- History of eye injury
If you fall into any of these categories, regular comprehensive eye exams are a must.
How Glaucoma is Diagnosed
Glaucoma is typically diagnosed during a comprehensive eye exam. Tests may include: Tonometry: Measures eye pressure.
Ophthalmoscopy: Examines the optic nerve
Perimetry: Checks peripheral vision
Pachymetry: Measures corneal thickness
Gonioscopy: Assesses the drainage angle. We recommend a yearly checkup, especially if you're at high risk.
Treatment Options for Glaucoma
Although damage from glaucoma is not reversible, treatment can slow or prevent further vision loss. Treatment Includes:
Eye Drops: Lower pressure inside the eye
Oral Medications: Used when drops alone aren’t enough
Laser Therapy: Improves fluid drainage
Surgery: Creates new drainage pathways when needed
Why Early Detection Matters
All types of glaucoma share one critical trait: they can cause irreversible optic nerve damage. Since patients are less likely to experience symptoms at the initial stages, it is important to opt for regular eye exams.
At Baumrind Eye, our team uses advanced diagnostic tools to detect glaucoma early and tailor treatments to your needs.
Screening Tests:
These include assessing your vision field, evaluating intraocular pressure, and examining the optic nerve.
Risk Awareness:
Knowing your family history and risk factors can guide how often you should get screened.
Personalized Care:
Treatment options range from eye drops to laser procedures or surgery, depending on the type and severity of the ailment. You can also visit our glaucoma services page for additional details on our methods for diagnosing and treating glaucoma.
Living with Glaucoma: What You Can Do
You and your eye care professional must work together to manage any form of glaucoma.
Here are some tips to protect your vision:
Get Regular Checkups:
Early detection can slow or stop vision loss.
Follow Treatment Plans:
Use prescribed eye drops or medications as directed.
Stay Informed:
To understand your risks and available treatments, educate yourself about the particular type of glaucoma you have.
Healthy Lifestyle:
To promote general eye health, eat a balanced diet, get regular exercise, and abstain from smoking.
When to See an Eye Doctor
If you experience sudden changes in your vision, eye pain, or halos around lights, don’t wait. These could be signs of angle-closure glaucoma or another serious condition.
Even without symptoms, it’s wise to get a baseline eye exam by age 40, and more frequently if you’re at risk. Ready to take control of your eye health? Contact us today to schedule your eye exam with an expert glaucoma specialist.
