Fluid drainage devices, systems, and methods

A method of forming a drainage device, the method comprising:

• arranging one or more microporous materials so as to form a device body with a reservoir defined therein, the reservoir being configured to receive and accumulate fluid;
• and
• securing a conduit to the reservoir such that the conduit is in fluid communication with the reservoir,
• wherein the conduit and the reservoir define a flow passage of the drainage device, and wherein the flow passage includes a variable flow resistance to a drainage that passes through the flow passage, the flow passage having a first flow resistance portion with a first flow resistance and a second flow resistance portion with a second flow resistance, the first flow resistance being different from the second flow resistance.

A glaucoma drainage device for draining a fluid from an interior region of a human eye to an exterior region of the human eye, the glaucoma drainage device comprising:

• a body having a continuous wall defining an internal reservoir within the body and a reservoir opening in the continuous wall communicating with the internal reservoir;
• and
• a conduit extending from the body by a conduit length, the conduit having opposing first and second conduit ends defining a passage through the conduit extending between the opposing first and second ends, the conduit first end engaging the internal reservoir opening to provide a fluidic connection between the conduit second end and the internal reservoir, the conduit length being sufficient to dispose the conduit first end at the exterior region of the human eye and to dispose the conduit second end at the interior region of the human eye,
• wherein at least a portion of the continuous wall has a wall portion composed of a microporous material, the wall portion having an internal side facing the internal reservoir and an opposing external side facing the exterior region of the human eye, the wall portion internal side having a low porosity surface extending an entirety of the wall portion internal side, the wall portion external side having an alternating surface comprising the low porosity surface disposed between high porosity surfaces.