Hanna Trephine System

Minimizing postoperative astigmatism is important for visual rehabilitation after penetrating keratoplasty. Surgeons agree, that a uniform, symmetrical trephination in both donor and host corneas minimizes postoperative astigmatism after sutures are removed.

The Hanna trephine attaches firmly to the eye through suction applied to the limbal conjundiva. Uniform support over the whole cornea during trephination prevents corneal vaulting. From a fully retracted position the blade rotates descending to a preset depth, after which the blade rotates, without further descent, cutting the displayed tissue and creating a uniform incision.

The Hanna trephine and the new Artificial Chamber replace with allow the surgeon to trephine both the recipient and donor cornea from the epithelial side, thus reducing shape disparity and postoperative astigmatism.

For more information or to order the Hanna trephine system please contact us.