Figure 2  .

Demonstration of the surgical technique in a human eye bank eye. (A) The anterior chamber has been filled with air. In between the blade tip and the air to endothelial interface light reflex, a dark band (arrowheads) is visible. (B) Because the dark band reflects unincised posterior corneal tissue, the dark band decreases in width when the blade is advanced into the deeper stromal layers. (C) When the blade appears to touch the air to endothelium interface, a stromal dissection level just anterior to the posterior corneal surface is reached.