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.
Regional and age differences in the human lens as determined by sucrose density centrifugation. (a) 34-year-old lens and (b) 74-year-old lens dissected into outer, barrier, inner, and core regions. (c) Diagram illustrating the four regions of the lens obtained by dissection.
