Methods and devices for increasing aqueous humor outflow
An ocular implant having an inlet portion and a Schlemm's canal portion distal to the inlet portion, the inlet portion being disposed at a proximal end of the implant and sized and configured to be placed within an anterior chamber of a human eye, the Schlemm's canal portion being arranged and configured to be disposed within Schlemm's canal of the eye when the inlet portion is disposed in the anterior chamber.
1. A method of treating glaucoma comprising:
inserting an ocular implant into a human eye, the ocular implant comprising a proximal portion, an inlet in the proximal portion, a distal portion, a channel extending from the inlet through the proximal portion and the distal portion, and an elongate opening on a first side of the ocular implant in fluid communication with the channel;
supporting Schlemm's canal tissue with the distal portion;
orienting the elongate opening with outflow channels of the eye;
disposing the inlet in an anterior chamber of the eye;
extending the proximal portion through trabecular meshwork of the eye; and
increasing an average outflow facility between the anterior chamber and Schlemm's canal by 121%-222% by allowing aqueous humor to flow into the inlet, into the channel and out of the elongate opening.
2. The method of claim 1 wherein the ocular implant further comprises a plurality of openings on a second side of the distal portion in fluid communication with the channel, the method further comprising allowing aqueous humor to flow from the trabecular meshwork through the openings to the channel.
3. The method of claim 1 wherein the implant further comprises a plurality of alternating spines and frames positioned longitudinally along the distal portion, interior surfaces of the spines and frames defining the channel, edges of the spines and frames defining the elongate opening, the method further comprising supporting Schlemm's canal tissue with the spines and frames.
4. The method of claim 1 wherein the distal portion comprises sections of greater circumferential extent and sections of lesser circumferential extent, edges of the sections of greater circumferential extent and edges of the sections of lesser circumferential extent defining the elongate opening, the method further comprising supporting Schlemm's canal tissue with the sections of greater circumferential extent and the sections of lesser circumferential extent.
5. The method of claim 1 wherein the supporting step comprises supporting 20% of Schlemm's canal length with the ocular implant.
6. The method of claim 1 wherein the supporting step comprises supporting 42% of Schlemm's canal length with the ocular implant.
7. The method of claim 1 wherein the ocular implant has a length of 8 mm to 16 mm.
8. The method of claim 1 wherein the ocular implant has a curved at rest shape, the orienting step comprising allowing the ocular implant to assume an orientation within Schlemm's canal that orients the elongate opening with the outflow channels.