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Perimetry (Visual Field Test)

Mapping Your Complete Field of Vision

**Perimetry**, commonly known as the **Visual Field Test**, is a non-invasive diagnostic procedure that precisely measures the full extent of your peripheral and central vision. It is essential for detecting vision loss that may not be apparent in standard eye charts.

This test is the **gold standard** for diagnosing and tracking damage from **Glaucoma**, which typically causes progressive, irreversible loss of peripheral vision. It is also critical for evaluating visual loss due to neurological issues like stroke, tumors, or damage to the optic nerve.

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Schedule your Visual Field Test for comprehensive eye health assessment.
Perimetry test for Glaucoma

Glaucoma Monitoring

Detects and quantifies the extent of peripheral vision loss caused by optic nerve damage from Glaucoma.

Perimetry test for Neurological conditions

Neurological Assessment

Identifies patterns of vision loss resulting from strokes, brain tumors, or other neurological pathways affecting sight.

Humphrey Field Analyzer machine

Advanced Technology

Utilizes modern automated perimetry (like the Humphrey Field Analyzer) for objective and repeatable results.

Tracking disease progress with perimetry

Disease Progression Tracking

Allows doctors to track changes over time, ensuring treatment is adjusted to halt further visual field deterioration.

How the Visual Field Test Works

Seated comfortably

You will be seated in front of a bowl-shaped instrument (perimeter) and asked to place your chin on a rest.

Focus on the Center

You must continuously look straight ahead at a fixed central target without moving your eye.

Click When Seen

Random flashes of light will appear in different locations. You press a button only when you see a light flash.

Frequently Asked Questions About Perimetry

Glaucoma damages the optic nerve, causing vision loss that begins in the periphery. Since the brain often 'fills in' these blank spots, patients don't notice the loss until the disease is advanced. Perimetry is the only test that can reliably map this loss early and quantify its progression.

The test is simple to perform, but it does require concentration and patience. It is crucial to remember to keep looking at the central target, even when the flashing lights appear far off to the side. Our staff will provide clear instructions and support throughout the test.

A complete Visual Field Test typically takes **15 to 25 minutes** for both eyes, depending on the specific testing protocol required by your doctor. Breaks can be taken if you feel fatigued during the test.