Skip to main content
. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Vision Res. 2008 Nov 8;49(1):74–83. doi: 10.1016/j.visres.2008.09.028

Figure 3.

Figure 3

The coordinate system of the One Curve method (OCM). The optical axis is parallel to the X axis and the equatorial axis is parallel to the Y axis. The anterior surface of the lens is positioned in the 1st and 4th quadrants of the coordinate system and the posterior surface in the 2nd and 3rd quadrants. The data set of the pixel coordinates above the optical axis was used in this method. The diameter (D), thickness (T), anterior thickness (bA) and posterior thickness (bP) are shown. h(x) is the OCM polynomial. Gaps on the lens surface are regions where the edge detection algorithm could not identify the lens profile.