Visual field test
If you use spectacles for reading, put them on.
We will test one eye at a time; close the other eye firmly.
Darken your room (complete darkness is not required).
Avoid lights shining directly on the screen or in your eyes.
Sit 40cm from monitor, face-on.
Your gaze should be comfortably on the mid-point of the screen.
Alter your seat or screen height, or tilt screen to achieve this.