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.
Diagrammatic Representation of Symmetry index of curvature which measures the vertical asymmetry of the mean anterior tangential curvature. Tangential curvature at a given point is measured by the device as shown in the figure. Such a curvature is derived for circles centered 1.5 mm on either side of Y axis and a difference between the two is the symmetry index
