A clear view trephine and lamellar dissector for corneal grafting.

We designed a corneal trephine that permits a full view of the cornea while cutting. The drive mechanism of the trephine enables the surgeon to keep the central cutting axis of the instrument stable while the trephine is rotated. The instrument accepts variable sizes of disposable trephine blades, making it versatile and economical. We also devised a lamellar dissector with two blades to negate the splitting force that occurs during a closed lamellar dissection. It enables the surgeon to perform a closed lamellar dissection with minimal force applied to the globe and minimal risk of perforation.