Non-invasive measurement of blood glucose using retinal imaging
First Claim
1. An apparatus for determining blood glucose concentration in an individual, the apparatus comprising:
- a light projector adapted to project light into retina of an eye of the individual, the light having a wavelength that is absorbed by visual pigment the retina;
a light detector adapted to detect light reflected from the retina; and
a processor with programmed instructions adapted to calculate the blood glucose concentration using the light reflected from the retina.
1 Assignment
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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
59 Claims
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1. An apparatus for determining blood glucose concentration in an individual, the apparatus comprising:
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a light projector adapted to project light into retina of an eye of the individual, the light having a wavelength that is absorbed by visual pigment the retina;
a light detector adapted to detect light reflected from the retina; and
a processor with programmed instructions adapted to calculate the blood glucose concentration using the light reflected from the retina. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An method for measuring a blood glucose value in an individual comprising:
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directing light into retina of an eye of the individual;
measuring a reflected light from the retina; and
determining a visual pigment regeneration rate in the retina of the eye of the individual using the measured reflected light. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for measuring blood glucose level of an individual comprising:
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directing light into retina of an eye of the individual; and
measuring a regeneration rate of visual pigment of the retina. - View Dependent Claims (31, 32, 33, 34)
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35. An apparatus for measuring a blood glucose value in an individual comprising:
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an illumination system for directing light into retina of an eye of the individual; and
an image analysis system for calculating a regeneration rate of visual pigment in the retina. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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Specification