DR. JOHN LAWRENCE NORRIS, M.D.
Hospitals at Olivet Rd, Santa Rosa, CA
License number
California C032402
Category
Medical Practice
Type
Ophthalmology
License number
California CO32402
Category
Hospitals
Type
General Acute Care Hospital
Address
Address
1415 Olivet Rd, Santa Rosa, CA 95401
Phone
(707) 540-0929
Professional information
Reflective Non-Contact Ocular Pulse Analyzer For Clinical Diagnosis Of Eye And Cerebrovascular Disease
US Patent:
2008024, Oct 2, 2008
Filed:
Mar 21, 2008
Appl. No.:
12/077778
Inventors:
John Lawrence Norris - Santa Rosa CA, US
Robert W. Allison - Rocklin CA, US
Robert W. Allison - Rocklin CA, US
International Classification:
A61B 3/16
US Classification:
600398
Abstract:
An instrument has been designed to study the pulsatile motion of the eye by analysis of a beam of light reflected from the corneal surface. A laser light beam probe of small spot size and low divergence strikes the cornea apex and the reflected movement is recorded by a sensor. Analysis of the beam movement reveals the energy in the eye pulse without the necessity of physically touching the eye. The value of the intraocular pressure is determined from the calculated power spectrum. The sensitivity, accuracy and efficiency of the light beam makes possible studying both eyes concurrently and comparison of the pulse parameters of onset, amplitude and duration reveals any delay in circulation to an eye.