VISION-TESTING DEVICE FOR VISUALLY DISPLAYING A CALIBRATED SIGNAL TO THE EYE AND RECORDING THE RESPONSIVE MOVEMENT THERETO

• US 3,609,016 A
• Filed: 12/30/1969
• Issued: 09/28/1971
• Est. Priority Date: 12/30/1969
• Status: Expired due to Term

• Current Assignee: Rudolph Hurwich
• Original Assignee: Arthur Jampolsky
• Inventors: Jampolsky, Arthur
• Primary Examiner(s): Schonberg, David
• Assistant Examiner(s): Sacher, Paul A.
• Application Number:
  US04/888,123
• Time in Patent Office: 637 Days
• Field of Search: 351/1,7,39 350/145,174,296,298
• US Class Current: 351/206
• CPC Class Codes: A61B 3/14 Arrangements specially adapted for eye photography apparatus or arrangements for taking photographs per se G03B

Abstract

A vision-testing device in the form of a frame which is placed in contact with and supported by the head of the subject to allow the subject freedom of head movement during examination. The frame carries a pair of signal display elements plus optical path modifiers, one for each eye, for forming, displaying and directing a separate display stimulus toward each eye without interfering with the normal vision. The frame further carries a set of flexible light pipes whose objectives are positioned to image the eyes upon a photographic recording means without interfering with the normal vision of the subject along with a record of the stimulus which is being directed to the eyes. Finally, the frame carries a point source of light which is positioned forward of and in a plane bisecting the eyes to provide corneal reflections from both eyes.

Claims

1. The method of diagnosing ocular disorders including the steps of gaze. a. reflecting light from a fixed source from the cornea of an open eye;

b. interposing predetmined and differentiated stimuli in the field of gaze of said open eye without materially interrupting the vision therein;

c. separately objectively recording the reaction of said open eye to each different stimulus by recording reflected light from said cornea at the time of interposing each different stimulus in said field of gaze;

d. substantially simultaneously recording each different stimulus as well as the reaction of said open eye for diagnostic purposes.

2. A vision tester for diagnosing ocular disorders comprising:

a. a source of light to be reflected from the cornea of an open eye;

b. frame means for fixing said source of light with respect to said cornea;

c. display means for interposing predetermined and differentiated stimuli within the field of gaze of said open eye without materially interrupting the vision therein;

d. recording means for objectively recording each reaction of said open eye to each different stimulus by recording reflected light from said cornea at the time of interposing each stimulus in said field of gaze, said recording means having a fixed relation to said cornea and said source of light. e. said recording means and said display means are operatively interconnected to record each stimulus displayed and the reaction of the eye thereto simultaneously.

3. The vision tester defined in claim 2, in which:

e. said display means includes a calibrated stimuli generator and an optical system adapted to interpose each stimulus generated into the field of gaze of said open eye.

4. The vision tester defined in claim 2, in which:

e. said recording means includes a light-gathering system so positioned with respect to said cornea as to collect light reflected therefrom without interfering with the normal vision in said eye.

5. The vision tester defined in claim 3, in which:

f. said stimuli generator and said recording means are operatively interconnected whereby each stimulus generated and said open eye'"'"''"'"'s reaction thereto are objectively recorded simultaneously.

6. The vision tester defined in claim 3, in which:

f. said stimuli generator is capable of generating a plurality of predetermined, differentiated stimuli, each of which elicits a different reaction from said open eye.