Threshold values which are ascertained during successive static perimetric examinations of the visual field of a subject by presenting variable-intensity stimuli to selected points of a test field are permanently recorded in the form of a single graphic display. The printer which makes the permanent record is connected with a computer which controls the sequence of presentation of stimuli during each examination. If the points of presentation of stimuli overlap, the computer ascertains the arithmetic mean of corresponding threshold values which are ascertained during successive examinations or subtracts one threshold value from the other (corresponding) threshold value. Such modified threshold values are also displayed on the record, together with threshold values which are interpolated by the computer between those threshold values which are ascertained during perimetric examination.
Method of graphically displaying the results of repeated perimetric examination of visual fields