A Visual Field Test (Perimetry) is a diagnostic test used to measure your side (peripheral) vision and detect any vision loss patterns. It plays a key role in diagnosing and monitoring glaucoma by identifying functional changes in vision that may not be noticed early. Using the advanced Zeiss Humphrey 840 analyzer, the test provides accurate and reliable results for early detection and ongoing management of glaucoma conditions.
Different testing patterns help assess vision sensitivity and detect glaucoma changes.
Basic test to quickly check for any major vision field defects.
Measures sensitivity of vision at different points in the field.
Focuses on central vision to detect early glaucoma changes.
Evaluates side vision where glaucoma damage often begins.
Tracks changes over time to monitor disease progression.
Repeated tests to compare results and adjust treatment if needed.
Recommended for individuals at risk or those needing regular glaucoma monitoring.
A simple and guided vision test to check how well you see in all directions.
You will sit comfortably in front of the machine and focus on a central point. One eye is tested at a time while the other is covered to ensure accurate results.
Small lights will appear in different areas of your vision. You need to press a button each time you see a light, helping measure how well you detect visual signals.
Your responses are recorded and converted into a detailed visual map. This helps the doctor understand vision loss patterns and monitor any changes over time accurately.
No, the visual field test is completely painless and non-invasive. You simply respond to light signals without any physical discomfort or contact with the eye.
The test usually takes about 10 to 20 minutes per eye. The exact duration may vary depending on the type of test being performed.
No special preparation is required. You can eat normally and continue your medications, but it is important to follow instructions carefully during the test.
It helps detect early vision loss, especially in the peripheral areas, and is essential for diagnosing and monitoring glaucoma progression over time.
Usually your doctor will ask you repeat your Perimetry test 6-12 monthly to check your optic nerve health
You may be asked to wear your glasses or a trial lens during the test to ensure accurate vision measurement based on your prescription.
Missing a few lights is normal. The machine is designed to account for this and still provide reliable results.
Yes, the test is safe and commonly performed for elderly patients, especially those at higher risk of glaucoma or vision loss.
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