Speckle interferemotry for blood glucose level detection

Maybe use speckle interferometry to measure blood glucose level by looking at the index of refraction of the aqueous humor of the eye (the clear bulge part in front of the iris).

Using a single laser

<to be continued>

Using absorption: http://iopscience.iop.org/1742-6596/277/1/012053/pdf/1742-6596_277_1_012053.pdf

Patent using interferometry to measure index of refraction: http://www.patentgenius.com/patent/6836337.html

2004 :(