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Types of Glaucoma: Understanding Your Diagnosis

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Glaucoma is a leading cause of blindness worldwide, affecting millions of people. It occurs when the optic nerve, which transmits visual information from the eye to the brain, becomes damaged due to increased eye pressure or poor blood flow. If you’ve been diagnosed with glaucoma, it’s important to understand which type you have, as different forms of the disease require different management strategies. At St. Michael’s Eye & Laser Institute, we provide expert care for all types of glaucoma, helping you protect your vision in the Tampa Bay area and Pinellas County.

Primary Open-Angle Glaucoma (POAG)

Primary open-angle glaucoma (POAG) is the most common form of glaucoma, often referred to as the “silent thief of sight” because it progresses slowly without noticeable symptoms. In this condition, the drainage canals in the eye become partially blocked, causing a gradual buildup of intraocular pressure (IOP). Over time, this elevated pressure damages the optic nerve, leading to peripheral vision loss.

Angle-Closure Glaucoma

This less common, but serious type occurs when the iris blocks the drainage angle, causing a sudden spike in eye pressure. Symptoms like severe eye pain, blurred vision, and nausea require emergency care to prevent permanent damage.

Normal-Tension Glaucoma (NTG)

NTG occurs when optic nerve damage happens despite normal eye pressure. Although the exact cause is unknown, it is believed that individuals with NTG have a more sensitive optic nerve, making it vulnerable to damage at lower pressures. Other factors, such as poor blood flow to the optic nerve, may also contribute to this condition.

Secondary Glaucoma

This type results from another condition, such as eye trauma, inflammation, or steroid use. There are various forms of secondary glaucoma, such as:

  • Neovascular glaucoma: Occurs when abnormal blood vessels grow on the iris, blocking fluid drainage.
  • Pigmentary glaucoma: Happens when pigment granules from the iris block the drainage angle.
  • Traumatic glaucoma: Develops after an injury to the eye that affects the drainage system.

Congenital Glaucoma

A rare form seen in infants, congenital glaucoma results from improper development of the eye’s drainage system. Symptoms include cloudy corneas and excessive tearing, requiring early diagnosis and treatment.

Take Control of Your Glaucoma

Understanding your glaucoma diagnosis is the first step in managing this complex disease. Whether you have primary open-angle glaucoma or a rarer form, the talented eye team at St. Michael’s Eye & Laser Institute in Largo, Florida can help you navigate your treatment options and monitor your condition to protect your vision.

If you’ve been diagnosed with glaucoma or are experiencing any symptoms of this condition, contact us today at (727) 585-2200. Don’t wait until your vision is compromised — start managing your glaucoma now to preserve your eyesight for the future!

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1030 W Bay Dr Suite 200
Largo, FL 33770