Patent ID: 6152875
Filing Date: 2000-11-28
Classification: A61B

Abstract:
A glucose concentration measuring method, comprising the steps of:i) irradiating a light beam from a predetermined light source to an eyeball of a subject that is located at a predetermined position;ii) detecting intensities of first and second backward scattered lights of said light beam, wherein said first backward scattered light is from an interface between a cornea of said eyeball and ambient air, and said second backward scattered light is from an interface between said cornea and an anterior aqueous chamber of said eyeball;iii) calculating a refractive index of an aqueous humor from said intensities of said first and second backward scattered lights; andiv) calculating a concentration of glucose in said aqueous humor in accordance with a correlation between a predetermined refractive index of said aqueous humor and concentration of glucose in said aqueous humor, and in accordance with said calculated refractive index of said aqueous humor.