Visual field test (perimetry test) is a diagnostic method that measures the visual capacity of the eye outside the center. Narrowing of the visual field or dark spots in some areas may be an early sign of serious eye and nervous system diseases.
Why is Visual Field Test Done?
- Visual field evaluation in the suspicion and diagnosis of glaucoma (eye pressure)
- Eye nerve (optic nerve) diseases
- Neurological diseases such as brain tumor, vascular occlusion or stroke
- Retinal diseases and retinal nerve damage measurement
- Complaint of dark spots or narrowing in the visual field
How is Visual Field Test Done?
The test is completely painless and non-invasive. The patient sits in front of the testing device, one eye is closed, and the other eye is asked to look at a fixed point in the center of the device. Light dots appear in different areas on the device screen, and the patient presses the button whenever he sees light. The device creates a visual field map by recording which points the patient can and cannot see.
Humphrey Visual Field Test
Humphrey visual field devices, which are considered the reference in modern eye examination, are considered the gold standard in glaucoma and retina monitoring worldwide. These devices, which can perform digital analysis, detect even the smallest functional losses and objectively report the results of the visual field examination.
Benefits of Visual Field Testing
- Glaucoma is diagnosed early
- Optic nerve function is evaluated objectively
- Retinal and brain-related losses are distinguished
- The treatment process is monitored at regular intervals
Frequently Asked Questions
How long does the visual field test take?
It takes approximately 5-10 minutes for each eye. The total duration of the test varies depending on the program to be applied.
How often should visual field testing be done?
Follow-up every 6-12 months is generally recommended for glaucoma patients. For those in the risk group, examination is recommended at least once a year.
Are the eyes dilated for visual field testing?
The eye is not dilated for standard perimetry testing. However, drops can be used when combined with a fundus examination.
