campimetry: campimetry n. a method of assessing the central part of the *visual field. The patient looks steadily with one eye at a target in the centre of a black screen two metres away. A small object on the end of a black rod is moved onto the screen and the patient tells the examiner when he sees it. This is repeated until a map is built up of the area in front of the eye in which such an object can be seen. Campimetry allows examination only of that part of the field of vision within 30 degrees in all directions from the centre.