Method of measuring ocular pulse

• US 3,948,248 A
• Filed: 09/05/1974
• Issued: 04/06/1976
• Est. Priority Date: 09/05/1974
• Status: Expired due to Term

• Current Assignee: University of Connecticut (State of Connecticut)
• Original Assignee: Harry J. Grossman, Joel L. Zuckerman
• Inventors: Grossman, Harry J., Zuckerman, Joel L.
• Primary Examiner(s): Howell, Kyle L.
• Application Number:
  US05/503,363
• Time in Patent Office: 579 Days
• Field of Search: 128/2 T, 128/2 V, 128/2.05 Z, 128/24 A, 73/80, 73/67.8 R, 73/67.6, 73/67.7
• US Class Current: 600/457
• CPC Class Codes: A61B 3/165 Non-contacting tonometers
• CPC Class Codes: A61B 5/02216 Ophthalmodynamometers
• CPC Class Codes: A61B 8/10 Eye inspection

Abstract

A method of obtaining a reading of the ocular pulse in its unbiased, natural state by transmitting continuous wave ultrasonic energy to the eye from a source spaced from the eye, receiving said energy reflected back from said eye, and detecting a modulation in said relected energy caused by pulsations of said eye.

Claims

1. A method of observing pulsations in an eye comprising the steps of:

positioning said eye to receive continuous wave ultrasonic energy,

transmitting continuous wave ultrasonic energy to said eye from a source spaced from said eye,

receiving said energy reflected back from said eye, and

detecting a modulation in said reflected energy caused by a pulsation of said eye and providing a signal in response to said modulation.

2. The method of claim 1 wherein said transmitting step further comprises transmitting said continuous wave ultrasonic energy through a gaseous atmosphere to said eye from said source and said receiving step further comprises receiving said energy reflected back from said eye through said gaseous atmosphere.

3. The method of claim 1 wherein said detecting step comprises frequency demodulating the Doppler frequency shift in said reflected energy relative to said transmitted energy caused by said pulsation and providing a signal which is proportional to said frequency shift.

4. The method of claim 3 further comprising the step of focusing said transmitted continuous wave ultrasonic energy.

5. The method of claim 1 wherein said transmitting step comprises transmitting said energy to the surface of said eye and wherein said energy is reflected back from said surface.

6. The method of claim 1 wherein said transmitting step comprises transmitting continuous wave ultrasonic energy to two eyes concurrently and said detecting step further comprises comparing said modulations from each said eye.