Abstract: A surgical instrument releasably securable to an eye using suction is provided. The surgical instrument comprises a body, a handle, and a porous member. The body forms an annular suction cavity. The annular suction cavity receives the suction and has an open end in a concave lower surface. The open end is directed toward the eye. The handle is integrally formed with the body. The handle extends upwardly away from the eye and radially outwardly from the body. The handle includes a passage adapted to deliver the suction to the suction cavity. The porous member is disposed within the suction cavity. The porous member is adapted to restrict absorption of the eye into the suction cavity through the open end and to permit the suction to permeate the suction cavity and reach the open end such that the surgical instrument is releasably securable to the eye using the suction.

Abstract: A surgical instrument for forming precise incisions in a cornea of an eye is provided. The surgical instrument comprises a blade carrier and an applanator. The blade carrier has a central bore and a blade. The blade depends from a distal end of the blade carrier. The applanator has an applanating surface. The applanator is received within the central bore of the blade carrier. The applanator is positioned within the central bore to axially position the blade a desired blade depth relative to the applanating surface such that when the applanating surface applanates the cornea the blade penetrates the cornea to a desired depth.