[A self-made corneal graft marker made from disposable trephine]

A homemade corneal marker was contrived from a Pharmacia Superblade disposable corneal trephine by cutting away one arm of the trephine and then bending the single remaining arm to an angle of 45 degrees to the handle. The radii of the trephines ranged from 6.5mm to 8.5mm, at successive increments of 0.25mm. In optical corneal grafts, this marker can be used to pinpoint the center of the cornea, thus providing more accurate centralization of the area to be grafted. In therapeutic corneal grafts, the marker provides a more accurate determination of the most suitable area to be grafted. Unnecessary removal of healthy tissue or incomplete removal of diseased tissue are thus avoided. This marker is made easily and at no additional expense, and show itself to be a useful instrument to accurately determine the graft area in corneal surgery.