Visual Field Testing
A visual field test measures how much ‘peripheral’ vision you have. It is a straightforward test, painless, and does not involve eye drops.
Essentially lights are flashed on, and you have to press a button whenever you see the light. Your head is kept still and you have to place your chin on a chin rest.
The lights are bright or dim at different stages of the test. Some of the flashes are purely to check you are concentrating.