Patent ID: 8292795
Filing Date: 2012-10-23
Classification: A61N

Abstract:
1. A method of positioning a first cannula having a distal end for the intraocular delivery of a therapeutic treatment to a target tissue within an eye having a lens so that the distal end of the cannula is in contact with the target tissue comprising: introducing a second cannula into the eye through an access site on the eye, the second cannula having a light source that projects a beam of light toward the target tissue; introducing the first cannula into the eye through a second access site on the eye so that the distal end of the first cannula is between the second cannula and the target tissue within the beam of the light projected toward the target tissue by the second cannula so that a shadow is cast by the distal end of the first cannula that falls on the target tissue, the shadow being observable through the lens of the eye; and advancing the distal end of the first cannula toward the target tissue until the shadow cast by the distal end of the first cannula coincides with the distal end of the first cannula as viewed through the lens, thus indicating contact of the distal end of the first cannula with the target tissue.