Patent ID: 9055902
Filing Date: 2015-06-16
Classification: A61B,G01N,G02C

Abstract:
1. An eye-mountable device, comprising: a transparent polymeric material having a concave surface and a convex surface, wherein the concave surface is configured to be removably mounted over a corneal surface and the convex surface is configured to be compatible with eyelid motion when the concave surface is so mounted, and wherein the transparent polymeric material includes channel in the convex surface; a substrate at least partially embedded within the polymeric material; an antenna disposed on the substrate; a two-electrode electrochemical sensor disposed on a surface of the substrate and including: a controller electrically connected to the electrochemical sensor and the antenna, wherein the controller is configured to: (i) apply a voltage between the working electrode and the reference electrode sufficient to generate an amperometric current related to the concentration of an analyte in a fluid to which the eye-mountable device is exposed; (ii) measure the amperometric current; and (iii) use the antenna to indicate the measured amperometric current, wherein the working electrode and the reference electrode are both exposed by the channel to provide direct contact with the fluid.