Abstract: Apparatuses and methods for attaching a hydrogel film to a product. The hydrogel film may be produced by injecting a monomer solution into a mold, polymerizing the monomer solution in the mold to produce a hydrogel sheet, and cutting the hydrogel sheet to produce one or more hydrogel films. The process may include attaching a hydrogel film of the one or more hydrogel films to a product. Attaching the hydrogel sheet to the product may include applying an adhesive onto the product, placing a first edge of the hydrogel film in the adhesive on the product, and placing a second edge of the hydrogel film in the adhesive on the product.

Abstract: A sensor (e.g., an optical sensor) that may be implanted within a living animal (e.g., a human) and may be used to measure an analyte (e.g., glucose or oxygen) in a medium (e.g., interstitial fluid, blood, or intraperitoneal fluid) within the animal. The sensor may include a sensor substrate, electrode or housing, an analyte indicator covering at least a portion of the sensor, and one or more optical signal stabilizing additives in an environment of the sensor.

Abstract: A sensor (e.g., an optical sensor) that may be implanted within a living animal (e.g., a human) and may be used to measure an analyte (e.g., glucose or oxygen) in a medium (e.g., interstitial fluid, blood, or intraperitoneal fluid) within the animal. The sensor may include a sensor substrate, electrode or housing, an analyte indicator covering at least a portion of the sensor, and one or more optical signal stabilizing additives in an environment of the sensor.