Non-invasive measurement of blood glucose using retinal imaging
First Claim
1. A method for determining blood glucose concentration in an individual, the method comprising:
- projecting time-varying light into retina of an eye of an individual; and
analyzing light reflected from the retina of the eye to determine the blood glucose concentration.
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Accused Products
Abstract
An apparatus carries out measurements of blood glucose in a repeatable, non-invasive manner by measurement of the rate of regeneration of retinal visual pigments, such as cone visual pigments. The rate of regeneration of visual pigments is dependent upon the blood glucose concentration, and by measuring the visual pigment regeneration rate, blood glucose concentration can be accurately determined. This apparatus exposes the retina to light of selected wavelengths in selected distributions and subsequently analyzes the reflection (as color or darkness) from a selected portion of the exposed region of the retina, preferably from the fovea.
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Citations
33 Claims
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1. A method for determining blood glucose concentration in an individual, the method comprising:
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projecting time-varying light into retina of an eye of an individual; and
analyzing light reflected from the retina of the eye to determine the blood glucose concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for determining blood glucose level of an individual comprising:
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illuminating retina of an eye of the individual with light;
performing a first measurement of reflectance of the retina of the individual; and
using the first measurement to determine the blood glucose level. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A method for determining blood glucose level of an individual comprising:
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sequentially illuminating retina of an eye of the individual with light, wherein the light has a plurality of light intensity levels;
measuring reflectance of the retina of the individual at each light intensity level of the plurality of light intensity levels; and
using the measured reflectance to determine the blood glucose level. - View Dependent Claims (33)
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Specification