FIG. 1 is a side view of a fixed-shape cannula for posterior delivery of radiation to eye;

FIG. 2 is a perspective view with tip pointing into page and handle showing in broken lines pointing out of page thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is top view thereof;

FIG. 6 is a side view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a side view.

In FIG. 1, the broken-line showing of environmental structure (eyeball and face) and an unclaimed handle are for the purpose of illustrating the cannula in a condition of use. The broken lines and the structure they depict form no part of the claimed design.