#$%^&*AU2013200472A120130822.pdf#####ABSTRACT OF THE DISCLOSURE A non-invasive blood glucose concentration sensing system and method includes sensing neurophysiological brain activity of the user during visual pigment regeneration in an eye of the user, and correlating the sensed neurophysiological brain activity to the glucose concentration in the blood of the user,CD CoD 0 r~ 0 c 00 0 000: 00 C)o C)o C)C