Visual field testing measures the full scope of your vision — both central and peripheral. It is one of the most important diagnostic tools for detecting and monitoring glaucoma, as well as neurological conditions that affect how the brain processes visual information. At Eyecare Optometry of Redondo Beach, visual field testing is part of our comprehensive approach to eye health.
What Is a Visual Field Test?
During the test, you look straight ahead at a central point while small lights flash at various locations in your peripheral vision. You press a button each time you see a light. The test maps out any areas where your peripheral vision is reduced or absent — called visual field defects.
Why It Matters
Glaucoma causes peripheral vision loss first, often without any noticeable symptoms. By the time you notice something is wrong, significant optic nerve damage may have already occurred. Regular visual field testing catches these changes early.
Conditions Detected by Visual Field Testing
- Glaucoma — peripheral vision loss from optic nerve damage
- Macular degeneration — central vision loss
- Stroke and brain tumors — vision loss patterns that indicate neurological issues
- Optic neuritis — inflammation of the optic nerve
- Retinal detachment — sudden peripheral vision loss
How Often Should You Have a Visual Field Test?
Patients with glaucoma or elevated eye pressure typically have visual field tests every 6 to 12 months. Healthy adults with risk factors should be tested annually. Your doctor will determine the right frequency based on your individual situation.