A device intended to be surgically implanted in the posterior segment of the eye to contain a therapeutic solution and provide its continuous passive delivery into the vitreous. It consists of a synthetic polymer tubular chamber designed to be periodically refilled with the therapeutic solution through its septum port at the scleral surface, and includes a porous distal end for passive diffusion of the solution into the vitreous; devices associated with implantation are typically provided with the implant. It is typically used to deliver a pharmaceutical agent for treating retinal diseases [e.g., neovascular age-related macular degeneration (nAMD), diabetic retinopathy].