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.
Iso-indicial contours of refractive index in the sagittal plane for eight representative human lenses aged A. 16 years, B. 35 years, C. 40 years, D. 57 years, E. 62 years, F. 74 years, G. 86 years, H. 91 years. The bisector of the sagittal plane is the optic axis which is pertinent to vision. [The 35 year old lens is labelled 35I. to distinguish it from the 35 year old lens in Figure 8].
