What is Glaucoma?

Glaucoma is not just one eye disease, but a group of conditions characterized by damage to the optic nerve, often resulting from elevated intraocular pressure. It's often referred to as the "silent thief of sight" because it can progress gradually without noticeable symptoms until significant vision loss occurs.

Types of Glaucoma

There are several types of glaucoma, including open-angle glaucoma (the most common form), angle-closure glaucoma, normal-tension glaucoma, and secondary glaucoma. Each type has its own set of risk factors and treatment approaches.


While early-stage glaucoma may not present any symptoms, as the condition progresses, individuals may experience peripheral vision loss, tunnel vision, eye pain, headaches, blurred vision, and halos around lights. Regular eye exams are crucial for early detection and intervention.

Types of Glaucoma Test

Intraocular Pressure (IOP) Measurement

Elevated intraocular pressure is a primary risk factor for glaucoma. Tonometry, the most common method for measuring IOP, involves using a specialized device to gently touch the surface of your eye or emit a puff of air.

Optic Nerve Examination

An examination of the optic nerve is crucial for detecting glaucoma. Ophthalmoscopy and optical coherence tomography (OCT) are common methods used to assess the health of the optic nerve and identify any abnormalities.

Visual Field Test

Also known as perimetry, this test evaluates your peripheral vision by assessing your ability to detect flashing lights or visual stimuli while focusing on a central point.


This test allows your eye care professional to examine the drainage angle of your eye, which is important in determining the type of glaucoma you may have.

Why Glaucoma Testing is Important

Early detection through regular glaucoma testing is crucial for several reasons:

  • Preservation of Vision: Detecting glaucoma in its early stages allows for timely intervention to prevent further vision loss.

  • Risk Management: Identifying individuals at risk of developing glaucoma enables proactive measures to minimize the progression of the disease.

  • Treatment Initiation: Early diagnosis facilitates the prompt initiation of treatment, which can help control intraocular pressure and preserve vision.

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