Microvision Inc. has been awarded a $1.6 million addition to a contract from the US Army's Medical Research and Material Command Telemedicine and Advanced Technology Research Center, to continue developing a head-worn display based on its scanned beam display technology that enables military surgical personnel and medics to access and transmit medical data. The system includes a wearable computer and a wireless network. Microvision said it will develop prototype demonstration units by the end of the year.   . . .    Robotic Vision Systems Inc. (RVSI) has received a $1.3 million order from a medical care network for custom data matrix readers based on its smart camera reader platform, which integrates lighting, optics, camera and processing elements into a compact desktop unit. RVSI will deliver the readers over a two-year period; deliveries are expected to begin this quarter.   . . .    Lumenis Ltd. announced it has signed an extended agreement with WaveLight Laser Technologies AG, of Erlangen, Germany, to exclusively distribute the ALLEGRETTO WAVE excimer laser system in the US, once the product has received FDA approval. Lumenis has distribution rights to the ALLEGRETTO WAVE in most Asian, European, Latin American and Middle Eastern countries. The device, which is used to treat myopia and astigmatism, was approved for use in Cananda in February. Lumenis said it will now begin to transfer or hire personnel for US sales, marketing, service and clinical support.