An ocular implant system for reducing intraocular pressure in an eye, comprising: an ocular implant comprising a proximal implant end, a distal implant end, and an internal lumen having a proximal lumen end, a distal lumen end, the ocular implant having a cross-sectional shape, wherein the ocular implant is adapted for deployment in the eye such that the distal lumen end is in fluid communication with the suprachoroidal space and the proximal lumen end is in fluid communication with the anterior chamber when the ocular implant is in a deployed location such that the internal lumen provides a fluid passageway for draining aqueous humor from the anterior chamber towards the suprachoroidal space; a delivery instrument comprising a hand-held component operatively coupled to an elongated applier, and a deployment structure coupled to the hand-held component and positioned over the applier, wherein the elongated applier is adapted for deployment of the ocular implant into the deployed location in the eye by inserting the ocular implant through the anterior chamber of the eye, and through a dissected tissue plane between the ciliary body and the sclera at a location proximate the scleral spur into the deployed location, wherein the ocular implant is configured for deployment through a corneal incision, and the elongated applier having a diameter and cross-sectional shape configured to be inserted through the internal lumen of the ocular implant such that the elongated applier is removably coupled to the ocular implant, and the elongated applier is adapted for insertion of the ocular implant through the corneal incision into the anterior chamber of the eye; and the elongated applier is operable to be proximally withdrawn into the deployment structure to uncouple the elongated applier from the ocular implant; and the elongated applier having a flexible, curved distal end region arranged to conform to the shape of the deployment structure upon proximal withdrawal of the distal end region into the deployment structure; and the deployment structure is arranged such that a distal edge of the deployment structure is operable to abut the proximal implant end when the elongated applier is proximally withdrawn, such that the location of the implant remains fixed in the deployed location during proximal withdrawal of the elongated applier. an ocular implant comprising a proximal implant end, a distal implant end, and an internal lumen having a proximal lumen end, a distal lumen end, the ocular implant having a cross-sectional shape, wherein the ocular implant is adapted for deployment in the eye such that the distal lumen end is in fluid communication with the suprachoroidal space and the proximal lumen end is in fluid communication with the anterior chamber when the ocular implant is in a deployed location such that the internal lumen provides a fluid passageway for draining aqueous humor from the anterior chamber towards the suprachoroidal space; a delivery instrument comprising a hand-held component operatively coupled to an elongated applier, and a deployment structure coupled to the hand-held component and positioned over the applier, wherein the elongated applier is adapted for deployment of the ocular implant into the deployed location in the eye by inserting the ocular implant through the anterior chamber of the eye, and through a dissected tissue plane between the ciliary body and the sclera at a location proximate the scleral spur into the deployed location, wherein the ocular implant is configured for deployment through a corneal incision, and the elongated applier having a diameter and cross-sectional shape configured to be inserted through the internal lumen of the ocular implant such that the elongated applier is removably coupled to the ocular implant, and the elongated applier is adapted for insertion of the ocular implant through the corneal incision into the anterior chamber of the eye; and the elongated applier is operable to be proximally withdrawn into the deployment structure to uncouple the elongated applier from the ocular implant; and the elongated applier having a flexible, curved distal end region arranged to conform to the shape of the deployment structure upon proximal withdrawal of the distal end region into the deployment structure; and the deployment structure is arranged such that a distal edge of the deployment structure is operable to abut the proximal implant end when the elongated applier is proximally withdrawn, such that the location of the implant remains fixed in the deployed location during proximal withdrawal of the elongated applier.