glucose the range of the device may also be adjusted to reflect low blood glucose values as well in a patient prone to hypoglycemia patients can further calibrate or check the contact lens readings using a conventional glucometer if desired techniques for applying or incorporating the glucose sensing optical coatings to contact lens material include in situ photo polymerization micro injection and ink jet printing other methods known to those skilled in the art may be used typical soft contact lenses are made of hydrogels such as poly hydroxy ethyl methacrylate and poly ethylene oxide co polysiloxide the inventive optical coatings are water soluble and compatible with both of these materials other conventional contact lens materials are known to those skilled in the art and are considered within the scope of the invention control of the shape and color patterning of contact lenses is well established using current injection molding technology in injection molding the contact lens polymer material is injected into the mold under pressure and cured crosslinked thermally or with radiation the lens is then removed from the mold and finished on a lathe lenses may also be produced entirely through molding that is they need no lathe cutting this is a recent development made possible through highly automated computer controlled mold production one manufacturing method for incorporating the inventive glucose sensing optical coatings into contact lens material to produce glucose sensing optical devices utilizes conventional molding technology to produce the optical pattern in the contact lens a two step molding method is utilized to allow encapsulation of the glucose sensing optical coatings in the contact lens so that they do not directly interact with the.