A Visual Field Test will allow your eye doctor to see the full horizontal and vertical range of what you are able to see peripherally. They determine the potential for blind spots (scotomas) occurring, which could indicate eye diseases.
A Confrontation Visual Field Test is the most common type of field test used by eye doctors. You will be asked to cover one eye while focusing on a specific target object, such as the doctor, and then you will be asked to describe images in his/her peripheral vision. If an eye disease is suspected, further comprehensive, more formal types of tests may be required.