An ophthalmic injection system has a tip segment attachable to and removable from a limited reuse assembly. The tip segment has a dispensing chamber housing, a plunger, a needle, a temperature control device, a thermal sensor, and a first housing at least partially enclosing the dispensing chamber housing,...http://www.google.com.au/patents/US20090036846?utm_source=gb-gplus-sharePatent US20090036846 - Ophthalmic Injection System
