The diamond architecture of the blade tip ensures a clean, precise incision every time. The 20g MVR creates a sclerotomy for 20g instruments. The 23g MVR can be used to create sclerotomies for use with 23g cannula systems, but will not fit through an entry cannula. The narrow 23g MVR is designed specifically to fit through a 23g entry cannula and can be used as a knife or a pick through an existing 23g port.