A hand-held manual ophthalmic surgical instrument intended to be used to perform a trabeculotomy, via transluminal access through Schlemm's canal (sinus venosus sclerae) and piercing of the trabecular meshwork, to reduce intraocular pressure (IOP) for the prevention/treatment of glaucoma. It is made of metal and plastic materials, and is in the form of a handle with a thin, flexible, extendable tip at the distal end designed to be progressively inserted into the eye through a corneal incision. This is a single-use device.