Patent ID: 8774885

Claim:
An apparatus for noninvasive measurement of a concentration of at least one substance in the eye, said application comprising: a mid-infrared radiation detecting device configured to detect mid-infrared radiation intensity of two wavelengths of light in a mid-infrared region naturally emitted by said eye, said mid-infrared radiation intensity from said eye containing a radiation signature of said at least one substance, said mid-infrared radiation detecting device detecting mid-infrared radiation intensity of the two wavelengths with one of said wavelengths having a high absorption correlation with the substance being measured and the other of said wavelengths having a lower absorption correlation with the substance being measured and providing an output signal based upon a ratio of the two intensities, and a processing device including a memory storing a plurality of pre-determined reference values and a processing circuit for receiving said output signal representative of said ratio of the two intensities output from said eye, comparing said output signal representative of said ratio of the two intensities from said eye with said plurality of reference values, and determining the concentration of the at least one substance based on said comparison, a display for reporting the concentration of said at least one substance from the eye.