A non-electric, hand-held, fibreoptic, device intended for controlled manual intraocular infusion of a fluid (e.g., viscoelastic substance), while facilitating illumination of the interior of the eye, during an ophthalmic surgical procedure (e.g., viscodilation of Schlemm’s canal). It includes a very thin and flexible tube (microcatheter) with an incorporated fibreoptic bundle and a manual fluid injector; it is designed for connection to a light source (not included). This is a single-use device.