Visual field test
visual field test · perimetry · peripheral vision test · automated perimetry
A machine checks how wide you can see to the sides. You look at the center and press a button when you notice a flash.
For glaucoma or suspected glaucoma, retina and nerve conditions, and after injuries.
⏱ Duration: usually 10 to 30 minutes for both eyes; results are often ready right away
Be sure to tell your doctor
How to prepare
- Rest. Get a good night's sleep. Focus matters for an accurate result.
- Glasses. Bring your glasses, especially reading glasses.
What to bring
- Your glasses
- Past results
- Your ID
How it goes
- One eye is covered with a patch
- You rest your chin on a stand and look at a center point
- Faint flashes appear in different places
- When you see a flash, you press the button
- Do not search for flashes with your eyes. Keep looking at the center
- Then the same is done for the other eye
What you'll feel
- It does not hurt
- It can be tiring and dull. You can ask for a break
- You will miss some flashes. That is how the test works
Afterwards
- No restrictions
- The doctor will compare the result with past ones and tell you what is next
Common questions
I missed a lot of flashes. Is that bad?
Not necessarily. The machine also shows very faint flashes on purpose.
Why repeat this test?
To see if your vision changes over time, especially with glaucoma.