An ophthalmic lens comprising a receptor moiety can be used to determine the amount of an analyte in an ocular fluid. The receptor moiety can bind either a specific analyte or a detectably labeled competitor moiety. The amount of detectably labeled competitor moiety which is displaced from the receptor...http://www.google.de/patents/US6850786?utm_source=gb-gplus-sharePatent US6850786 - Ocular analyte sensor
