Patent ID: 7803102

Claim:
A device for local, directional delivery of radiation to intraocular target tissue comprising: a radiation source; a substantially rigid cannula sized for intraocular insertion into an eye and having a proximal end and a distal end for receiving the radiation source comprising a tubular member with at least one lumen and having a radiation window at its distal end for providing a desired radiation dose profile when the radiation source is received therein, the distal end of the cannula including a cover covering the window with a fluid tight seal so as to prevent contact of body fluids with the radiation source; and a housing to which the proximal end of the cannula is secured for moving the radiation source within the lumen of the cannula between a retracted proximal position interior of the housing and a treatment position at the distal end of the cannula, the housing comprising an advancement mechanism operatively coupled to the radiation source, the advancement mechanism being movable to move the radiation source between the retracted position and the treatment position.