Some cookies are essential to the running of the website, while others (analytics) help us to make improvements. We also incorporate functionality from other websites, such as video, social media feeds and ReachDeck (text-to-speech and translations services) which may set cookies. More on how we use cookies
This website uses text-to-speech software called ReachDeck to read and / or translate its content. To use ReachDeck, you must allow ReachDeck cookies; the ReachDeck icon will then appear at the bottom of your screen.
You can find out more about how ReachDeck uses cookies or change your cookie preferences at any time by going to our cookies page.
Allow ReachDeck cookies Do not use ReachDeck
This site is best viewed with a modern browser. You appear to be using an old version of Internet Explorer.
The visual field is the extent of your peripheral or side vision.
A visual field test is carried out to see how dim a light can be and still be seen in your peripheral vision.
Some medical conditions affect the visual field of one or both eyes without reducing visual acuity (central vision) and you may therefore be unaware of a field defect.
Visual field tests may be carried out on several different types of equipment. The equipment selected depends on the reason for doing the test. Generally a visual field test takes between 15 to 45 minutes to complete.
You should bring any current spectacles to the test appointment.