Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Before corneal staining, (A) the positions of the six zones (Ra–Rf, La–Lf) made on the isolated canine cornea. The black arrow indicates the corneoscleral limbus. Photoshop software was used to stitch (B) the cornea staining maps in each zone and draw (C) the nerve direction.
