An implant device for implantation in a human to fluidly connect a lacrimal apparatus to a paranasal sinus through a fistula formed between the lacrimal apparatus and the paranasal sinus, the implant device characterized as comprising: a proximal end at a first longitudinal end of the device, to be disposed with a first end of an internal passage opening in the lacrimal apparatus when the implant device is implanted; a distal end at a second longitudinal end of the device that is longitudinally opposite the first longitudinal end, to be disposed in the paranasal sinus with a second end of the internal passage open in the paranasal sinus when the implant device is implanted; a conduit extending from adjacent the proximal end to adjacent the distal end, to be disposed through the fistula when the implant device is implanted; the internal passage extending between the proximal end and the distal end and through the conduit, the internal passage having the first end open at the proximal end and the second end open at the distal end; a length of the device longitudinally along the device between the proximal end and the distal end in a range of from 8 millimeters to 50 millimeters; a width of the internal passage transverse to the length in a range of from 0.25 millimeter to 5 millimeters; and an exterior of the conduit comprising an anchoring surface feature including protrusion areas and recess areas, with at least a portion of the protrusion areas to be disposed in the fistula to engage tissue exposed within the fistula to anchor the implant device when the implant device is implanted, and wherein the protrusion areas are on a longitudinal portion of the conduit and the longitudinal portion of the conduit with the protrusion areas is disposed at least 4 millimeters from the proximal end of the implant device and extends for at least 4 millimeters along the length of the implant device. a proximal end at a first longitudinal end of the device, to be disposed with a first end of an internal passage opening in the lacrimal apparatus when the implant device is implanted; a distal end at a second longitudinal end of the device that is longitudinally opposite the first longitudinal end, to be disposed in the paranasal sinus with a second end of the internal passage open in the paranasal sinus when the implant device is implanted; a conduit extending from adjacent the proximal end to adjacent the distal end, to be disposed through the fistula when the implant device is implanted; the internal passage extending between the proximal end and the distal end and through the conduit, the internal passage having the first end open at the proximal end and the second end open at the distal end; a length of the device longitudinally along the device between the proximal end and the distal end in a range of from 8 millimeters to 50 millimeters; a width of the internal passage transverse to the length in a range of from 0.25 millimeter to 5 millimeters; and an exterior of the conduit comprising an anchoring surface feature including protrusion areas and recess areas, with at least a portion of the protrusion areas to be disposed in the fistula to engage tissue exposed within the fistula to anchor the implant device when the implant device is implanted, and wherein the protrusion areas are on a longitudinal portion of the conduit and the longitudinal portion of the conduit with the protrusion areas is disposed at least 4 millimeters from the proximal end of the implant device and extends for at least 4 millimeters along the length of the implant device.