A microfluidic pump for implantation proximate an eye of a patient is provided herein. The pump includes a first substrate portion and a second substrate portion adjacent the first and a chamber that has a bottom surface and a top surface provided by the first and second substrate portions. A gas is produced within the chamber so that it displaces fluid from the chamber. The pump also includes an inlet channel and an outlet channel coupled to the chamber, the inlet channel being separated from the chamber by a first gap and the outlet channel separated from the chamber by a second gap. The gaps inhibit the gas from moving out of the chamber. Other microfluidic pumps and intraocular devices are also disclosed.
