[Double-guided vacuum trephine system "Asmotom"].

A new, doubly guided cornea suction trephine system is presented. By means of a suction rim placed on the limbus corneal and a suction disc in the centre of the cornea the vault of the cornea is preserved throughout the trephination procedure. Cutting is performed by a motor trephine, which rotates between the inner and the outer suction. The system allows creation of an absolutely safe perforation in a 360 degrees cut. The cut edges are precise and sharp. Both donor and recipient are trephined from the epithelial side. The endothelial cell loss is very low, amounting to 0.170 mm. The suction stabilization prevents any tilting of the trephine and avoids elliptical forms. Preliminary clinical experiences are presented.