Understanding Glaucoma Causes and Preserving Your Vision

Asian Eye Institute is here to provide you with expert eye care, prioritizing your long-term vision health. We have specialists who can treat patients with glaucoma using a personalized and comprehensive approach. With our state-of-the-art facilities, we can diagnose your conditions early and precisely, and provide you with advanced treatment options to manage this complex eye disease. Our commitment is to ensure the best possible outcomes, helping you maintain your quality of life.

Glaucoma is one of the leading causes of permanent blindness in the Philippines and the world. It refers to a group of eye conditions that damage the optic nerve, which is responsible for transmitting visual information to the brain. This damage often occurs when the pressure inside your eye, known as intraocular pressure (IOP), becomes too high. Over time, elevated IOP can compress and injure the delicate nerve fibers, leading to irreversible vision loss.

While high intraocular pressure is the primary cause of glaucoma, it's important to understand that there are several contributing conditions and risk factors:

• Elevated Intraocular Pressure (IOP): This is the most common cause of glaucoma. The eye constantly produces a clear fluid called aqueous humor. If this fluid does not drain properly, it builds up, increasing pressure inside the eye and damaging the optic nerve.
• Age: The risk of developing glaucoma increases significantly with age, particularly for individuals over 60.
• Family History: If you have a family member with glaucoma, your risk is significantly higher. This indicates a genetic predisposition.
  Ethnicity: Certain ethnic groups have a higher prevalence of specific types of glaucoma.
• Medical Conditions: Underlying health issues such as diabetes, heart disease, and high blood pressure can increase your susceptibility.
• Eye Anatomy or Injuries: Previous eye injuries, severe eye infections, or certain types of eye surgery can affect the eye’s drainage system.
• Long-Term Corticosteroid Use: Prolonged use of steroid medications, especially eye drops, can increase IOP.

In addition to knowing what glaucoma is, understanding its specific types is essential to effectively treat the condition:

• Primary Open-Angle Glaucoma (POAG): This is the most common type of glaucoma. It develops slowly and painlessly, with the eye's drainage system (trabecular meshwork) appearing open but not functioning efficiently. This leads to a gradual buildup of fluid and pressure.
• Angle-Closure Glaucoma (ACG): Less common but more acute. This occurs when the iris (the colored part of your eye) bulges forward and completely blocks the drainage angle, causing a rapid and severe increase in eye pressure. This is a medical emergency requiring immediate attention.
• Normal-Tension Glaucoma: In this type, optic nerve damage occurs even with normal eye pressure. It suggests other factors, such as blood flow to the optic nerve, might be involved.
• Congenital Glaucoma: A rare form present at birth, caused by abnormal development of the eye’s drainage system.
• Secondary Glaucoma: This type develops as a complication of another medical condition, eye injury, certain medications, or other eye diseases.

Glaucoma is often called the “silent thief of sight” because it typically presents with no noticeable symptoms in its early stages. Vision loss usually begins in the periphery and progresses slowly, often going undetected until significant, irreversible damage has occurred. Regular comprehensive eye exams are crucial for early detection.

If symptoms do appear, especially in later stages or with acute angle-closure glaucoma, they may include:

• Gradual loss of peripheral vision, often described as tunnel vision
• Blurred vision
• Seeing halos around lights
• Severe eye pain or headache (especially with angle-closure glaucoma)
• Nausea and vomiting accompanying eye pain (angle-closure)
• Redness in the eye

Glaucoma progresses slowly, and symptoms may not be noticeable at first. Early diagnosis is necessary to prevent permanent blindness or any irreversible damage. Depending on the type and severity of your condition, doctors may prescribe different treatment methods aimed at lowering intraocular pressure and preserving your optic nerve.