Corneal surface and pupillary cardinal axes marker

Abstract

A corneal surface and pupillary cardinal axes marker instrument and a method of corneal marking are provided for purposes of astigmatic refractive surgery. The instrument comprises a head and a handle. The head features a blade and point marker assembly having readily visible ends as well as a blade assembly concept with a horizontally placed inclinometer allowing the exact determination and marking of the cardinal axes of the pupil, the marking of the surface of the corneal flap in LASIK surgery, and the measurement of positional eye cyclotorsion. The marking method involves preoperatively marking the corneal surface with suitable indicia in a pattern of radial lines extending over the inferior half of the cornea. The marking is done preoperatively while the patient is sitting at the slit lamp, with the inclinometer of the instrument horizontally leveled.

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