What is Primary Open-Angle Glaucoma?

by | Apr 13, 2023 | Eye Physicians of North Houston, Glaucoma | 0 comments

What is Primary Open-Angle Glaucoma?

Primary open-angle glaucoma is the most common form of glaucoma. POAG usually occurs in older adults, but it can do so in younger adults if they have certain risk factors such as a racial origin, family history of the disease, or extremely thin corneas.

There are a lot of causes of POAG, such as painless and slowly impairing vision, which is why it is important to see an ophthalmologist regularly for a checkup. Normally, blind spots appear first in the peripheral field of vision. Once POAG reaches its advanced stages, the visual damage is irreversible.

In glaucoma, the central issue is damage to nerve tissue caused by excessive eye pressure, also known as intraocular pressure (IOP). When one’s IOP increases, the optic nerve, the neural connection between the eyeball and the brain, gradually becomes damaged. Once these optic nerve cells perish, they cannot regenerate, and the associated peripheral vision loss becomes permanent. 

What Causes Primary Open-Angle Glaucoma? 

The exact cause of primary open-angle glaucoma is unknown, but there are a few theories. One theory from the Glaucoma Foundation states that it is caused by the trabecular meshwork and the cells involved, while others state that it is caused by an enzymatic problem. According to another theory, POAG can occur as a result of an eye structural defect, which affects the eye’s drainage system. 


The POAG disease has no cure at this point, but it can be slowed down by treatment. Prescribed medications should be taken regularly in the form of eye drops to prevent vision loss related to glaucoma. 

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Using only the most advanced technologies and techniques, the board-certified ophthalmologists at Eye Physicians of North Houston provide compassionate, comprehensive patient-centered care in Houston.

Our conveniently located ophthalmology practice, open Monday through Friday from 8:00 am to 5:00 pm, welcomes thousands of patient visits each year. We invite you to schedule an eye exam with one of our eye doctors in North Houston at (281) 893-1760 or by visiting our website at 1960eye.com.