What Is Visual Field Testing (Perimetry)?

Visual field testing, also called perimetry, is a simple and important eye test that measures how well you can see in your central and peripheral (side) vision. It helps detect areas of reduced or missing vision that may not be noticeable in daily life.

During the test, you look at a central target while small lights appear at different locations. You press a button whenever you see a light. The results help your ophthalmologist assess the function of your optic nerve and visual pathways.

Perimetry is especially important for the diagnosis and monitoring of glaucoma. It is also advised for optic nerve disorders, retinal conditions and certain neurological problems.

FAQs About Perimetry

Is visual field testing painful?

No. Perimetry is a non-invasive and painless test.

How long does a perimetry test take?

The test usually takes around 5–15 minutes per eye, depending on the type of test performed.

How should I prepare for the test?

No special preparation is usually needed. If you use glasses for distance vision, you may be asked to wear appropriate correction during the test.

Can I blink during perimetry?

Yes. You can blink normally. Try to keep looking at the central fixation target and avoid searching for the lights.

Why is perimetry repeated?

Results can be affected by fatigue, concentration and familiarity with the test. Repeating the test helps your ophthalmologist monitor changes over time.

Visual Field Testing by Perimetry in Ahmedabad

Visual field testing/Perimetry is available at Ruta Eye Hospital in Ahmedabad. It is an important part of glaucoma evaluation and follow-up.

At Ruta Eye Hospital, Ahmedabad, perimetry is used along with a comprehensive eye examination to help detect and monitor changes in vision.

Early detection and regular monitoring can help protect your sight.