Robert W Sweat

US Patent:

63058049, Oct 23, 2001

Filed:

Mar 24, 2000

Appl. No.:

9/534782

Inventors:

Mark J. Rice - Johnson City TN
Robert H. Sweat - Lexington KY
James M. Rioux - Lexington KY
William T. Williams - Jonesborough TN
Wilson Routt - Lexington KY

Assignee:

Fovioptics, Inc. - Lexington KY

International Classification:

A61B 310

US Classification:

351221

Abstract:

Illuminating light of selected wavelengths in the visible or infrared range is projected through the pupil of the eye onto the fundus, and the light reflected back and out through the pupil is detected and analyzed, preferably using the area of the optic disk for analyzing the retinal vessels overlying the optic disk. Specific wavelengths of illuminating light may be chosen for each blood component to be analyzed depending on the spectral characteristics of the substance being analyzed. The reflected image from the retina may be used to measure non-photoreactive blood components such as hemoglobin, and photoreactive components such as bilirubin. For the measurement of photoreactive components, images may be taken before and after, or during, illumination of the eye with light at wavelengths which will affect the photoreactive analyte, enabling measurements of the concentration of the analyte.

US Patent:

20020072658, Jun 13, 2002

Filed:

Sep 12, 2001

Appl. No.:

09/952491

Inventors:

Mark Rice - Johnson City TN, US
Robert Sweat - Lexington KY, US
James Rioux - Lexington KY, US
William Williams - Jonesborough TN, US
Wilson Routt - Lexington KY, US

Assignee:

Fovioptics, Inc.

International Classification:

A61B005/00

US Classification:

600/318000

Abstract:

Illuminating light of selected wavelengths in the visible or infrared range is projected through the pupil of the eye onto the fundus, and the light reflected back and out through the pupil is detected and analyzed, preferably using the area of the optic disk for analyzing the retinal vessels overlying the optic disk. Specific wavelengths of illuminating light may be chosen for each blood component to be analyzed depending on the spectral characteristics of the substance being analyzed. The reflected image from the retina may be used to measure non-photoreactive blood components such as hemoglobin, and photoreactive components such as bilirubin. For the measurement of photoreactive components, images may be taken before and after, or during, illumination of the eye with light at wavelengths which will affect the photoreactive analyte, enabling measurements of the concentration of the analyte.