A system for providing controlled release of an active agent in an eye includes a device with a shape thereof for enabling placement of the device under a conjunctiva of an eye and additionally preventing migration of the device in the eye after placement of the device under the conjunctiva. The device...http://www.google.de/patents/US5300114?utm_source=gb-gplus-sharePatent US5300114 - Subconjunctival implants for ocular drug delivery
