Fig. 3.

The longitudinal and radial distributions of TM mechanical properties. (A) The averaged point stiffness values of the TM measured with a nanometer scaled probe (radius of 20 nm). (B) Young's modulus values of the TM measured with a micrometer scaled probe (radius of 1 μm). Results are grouped into apical, mid-turn, and basal regions according to their longitudinal position. Each longitudinal group is further divided into the following radial zones: HC (white), MB (gray), and limbal (black). The bars represent the standard error, and the number of samples analyzed is indicated by the number shown in each column. See Fig. 6, which is published as supporting information on the PNAS web site, for more details.