Automatic visual field examination including fixation monitoring and compensation

Abstract

Abstract AN ILLUSTRATIVE EMBODIMENT OF THE PRESENT INVENTION INCLUDES METHOD AND APPARATUS FOR DETERMINING THE THRESHOLD VALUE OF VISUAL STIMULI PRESENTED AT SELECTED LOCATIONS IN THE VISUAL FIELD OF A SUBJECT. A PROGRAMMED AUTOMATIC DATA PROCESSING SYSTEM IS UTILIZED TOGETHER WITH A SUBJECT RESPONSE DEVICE IN A UNIQUE TWO-WAY FEEDBACK SYSTEM TO SELECT LOCATION, BRIGHTNESS AND SPOT SIZE OF STIMULI (SPOTS OF LIGHT) TO BE PRESENTED AND TO PRESENT THESE STIMULI ON A TEST SCREEN AT LOCATIONS WHICH ARE UNPREDICTABLE TO THE SUBJECT, WITH THE TERM STIMULI INCLUDING TEST SPOTS WHICH ARE PERCEIVED AND THOSE WHICH ARE NOT PERCEIVED. THE SUBJECT COMMUNICATES WITH THE DATA PROCESSING EQUIPMENT VIA THE SUBJECT RESPONSE DEVICE AND THE SYSTEM INTERPRETS THE RESPONSES TO ALTER THE STIMULUS PRESENTATION REGIME DYNAMICALLY WHILE COMMUNICATING FEEDBACK TO THE SUBJECT OF CORRECT OR INCORRECT PERCEPTION OF EACH STIMULUS. EYE MOVEMENT OF THE SUBJECT IS MONITORED AND COMPENSATED FOR IN THE PRESENTATION OF THE SPOTS OF LIGHT BY OTHER SYSTEM APPARATUS WHICH ALSO COMMUNICATES WITH THE DATA PROCESSING EQUIPMENT TO CENTER THE TEST FIELD RELATIVE TO THE DIRECTION OF GAZE OF THE SUBJECT WHICH IS NOT NECESSARILY THE CENTER OF THE TEST SCREEN OR A FIXED POINT,

Inventors

• 👤 J Lynn
• 👤 G Tate

Bibliographic Details