Cannula systems and exemplary methods are described, including a cannula system (100) comprising a body (102) comprising a surface configured to be placed on a sclera of an eye a light emitting system (108) contained within the body a conduit (106) coupled to the body, the conduit comprising an infusion port 8116) a transparent cannula (104) coupled to the body and extending from the surface. The cannula (104) comprising a distal end comprising an outlet (118), and a plurality of optical elements (1406a-d) longitudinally spaced along the cannula and proximal to the distal end, each of the plurality of optical elements extending circumferentially around at least a portion of the cannula and a lumen (202) configured to transmit the light from the light emitting system (108) out of the outlet (118) and to deliver fluid from the infusion port out of the outlet, the plurality of optical elements (1406a-d) configured to disperse the light at angles (1408a-d), at least some of the angles being the same or at least some of the angles being different.
