Patent ID: 8452363

Claim:
A handheld measuring appliance for measuring at least one analyte in an eye fluid in an eye, having a measuring system which is set up to measure at least one property of the at least one analyte and/or at least one analyte-dependent change of property in at least one ocular sensor in the eye fluid, and a positioning system which is set up to measure a spatial positioning, wherein the spatial positioning comprises a distance between at least one measurement location in the eye and the handheld measuring appliance and also at least one further positioning co-ordinate, the handheld measuring appliance further comprising an integrated calibration system, wherein the calibration system is set up to perform a comparison measurement, using a separate measuring appliance, of at least one analyte concentration in a body fluid and to take the comparison measurement into account when determining the concentration of the at least one analyte, wherein the handheld measuring appliance is set up to ask a patient to perform a calibration measurement.