Sub-tenon drug delivery

摘要

Drug delivery cannulae (50) are disclosed. One embodiment of a cannula includes a distal portion (52) having a radius of curvature substantially equal to a radius of curvature of the globe of the human eye, a proximal portion (54), and a bend separating the distal portion and the proximal portion. A tangent (72) of the distal portion at the bend is disposed at an angle of no more than about 56 degrees with respect to the proximal portion. The cannulae are capable of sub-Tenon drug delivery to the posterior segment of the human eye proximate the macula.