Method for detecting and recording abnormal human eye responses

Abstract

Abstract This invention is believed especially useful for detecting and recording drug abuse and chemically or disease caused abnormalities in eye behavior. Its principal proposed method is to photographically record visible changes in the eyes caused by certain stimuli, including the intensity of ambient light. The subject person is positioned so that his eyes are first photographed at short range by a ''''POLAROID''''-type of camera in a regulated amount of light. Then the light conditions or other stimuli are changed in ways which normally stimulate known changes in the pupil sizes or direction of view, and a second photograph is recorded preferably on the same photo print alongside the previous image. At the same time the face of the subject is photographed for positive identification. The eye images can be photographed accurately enough to allow measuring the pupil diameters within acceptable limits of accuracy. For further data, it may also be desirable to photograph more than two pictures of each pupil on the same print: one pair with a standard level of illumination or stimulation, the others with different amounts of illumination or different stimulations. Apparatuswise, several embodiments of this system are possible. In one, the ''''POLAROID''''-type camera can be mounted in one end of a ''''look-in'''' box, which has a face hole for the subject. This would have lights within to illuminate the subject''s eyes with different and controlled amounts of illumination, starting with comfortable soft light and increasing greatly, all operated by a timing system which includes sequential timing switches electrically connected to the camera shutter and to the lights. The camera or its view could be shifted in position slightly between successive photographs so as to put one image above, below or beside the other, or the subject''s eyes could be induced to shift slightly from one side to the other between photographs, accomplishing the same result. Instead of changing the light level as the stimulus, other embodiments of this system use other stimuli such as moving objects, verbal or pictorial stimuli, or psychological media. Either way, eyes which are drugged or are affected by certain nervous disabilities, photograph differently from normal ones.

Inventors

• 👤 J Watt

Bibliographic Details