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.
Original corneal image (an) (A), the corresponding processed image (bn) (B), extracted corneal anterior surface contour (cn) (C), and the position of the extracted corneal anterior surface contour in the original image (dn) (D), where n = 0 (initial state), A1 (first applanation), HC (highest concavity), A2 (second applanation), end.
