An intraocular device for implantation in an eye of a patient is provided. The intraocular device includes an inlet tube, an outlet tube, and a microfluidic chamber. The microfluidic chamber includes a chamber inlet coupled to the inlet tube, a chamber outlet coupled to the outlet tube, and one or more fluidic barriers. Each fluidic barrier is configured such that, as a fluid is injected into the microfluidic chamber, a front of the fluid coincides with the fluidic barrier before any of the fluid passes beyond the fluidic barrier. Associated methods are also disclosed herein.