Provided are compositions, devices and systems, methods for assessing, treating and/or preventing an intraocular disease or disorder in a subject, wherein the etiology of the intraocular disease or disorder comprises infection of a microorganism in the intraocular space or cavity of the subject. Provided are compositions, devices and systems, and methods for assessing, treating and/or preventing age-related macular degeneration (AMD) in a subject, e.g., a human patient.