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Jun 27, 2023Visual field (peripheral vision) testing is used to help diagnose and monitor conditions affecting the optic nerve or the visual pathway. Typically, we test patients who are attending the hospital for their glaucoma or neuro-ophthalmology appointment, though many other patients can be required to undertake the test. We use a Humphrey visual field machine and the test is supervised by a technician.
A Humphrey visual field assesses the sensitivity of your vision. It does this by showing you small white lights of varying intensity and recording when you see them.
You may be referred to the hospital by your optician and based on this referral we would like to find out what a visual field test can tell us about your vision. This test determines your sensitivity to light in different areas of your retina. There are a wide range of reasons you are being asked to perform the test (for example, glaucoma screening and / or monitoring or checking reduced vision). However, the objective is that the clinician can determine whether your visual field test result is normal.
Subsequent tests help to monitor your eye condition. This informs the healthcare professional how to proceed with your continued eye health.
A standard test takes between 4 and 8 minutes but this varies patient to patient.
It is important to bring any glasses that you currently use with you as you will need them at various points throughout your ophthalmic review.
It is important that both eyes are monitored carefully in order to detect any changes that may occur.
No. The brightness will vary throughout the test in order to accurately determine your visual sensitivity.
It is unlikely that one or two mistakes will affect the test. However, it is important to only click when you see a white light in order to produce a result with the best possible reliability.
Yes, you can have your eye closed or open under the patch, whichever makes you more comfortable.
Yes, the room is often air conditioned due to the heat generated by the machines. If you are cold then please speak to the technician who will adjust the temperature accordingly.