| abstract |
The concentration of glucose in the anterior chamber of an eye is non-invasively measured by guiding a beam through a polarizer ( 4 ), a quarter wave plate ( 6 ), a polarization modulator ( 20 ), and an analyzer ( 7 ). After initializing the polarizer and the analyzer to extinguish the beam, it is guided parallel to the iris ( 56 ) of the eye ( 50 ) and introduced into the anterior chamber ( 57 ), wherein it is refracted, impinges on and is reflected from the iris, and exits the anterior chamber approximately collinear with the portion ( 55 A) of the beam incident on the anterior chamber. The beam then is guided onto a detector ( 10 ), and a sufficient signal is applied to the polarization modulator to extinguish the beam. The signal represents the glucose concentration in the patient's blood. |