Patent Title: Method and system for measuring retinal
Patent Number: 9,101,309
Inventors: Liu; Zenghe (Alameda, CA), Weibel; Douglas (Madison, WI)
Assignee: Google Inc. (Mountain View, CA)
Family ID: 1000000420163
Appl. No.: 14/091,092
Filed: November 26, 2013
Abstract: A body-mountable retinal sensing device includes an electrochemical sensor embedded in a polymeric material configured for mounting to a body surface, such as a cornea. The electrochemical sensor includes a working electrode, a reference electrode, and a reagent localized near the working electrode that selectively reacts with retinal. Application of a voltage between the working electrode and the reference electrode causes a current related to a concentration of retinal in a fluid to which the electrochemical sensor is exposed. The current is measured by the body-mountable device and wirelessly communicated.