Figure 1. SEM overview of fiber cell
membrane surfaces of fractured intact embryonic chicken lens (E18)
along the anterior/posterior (median sagittal) axis. This fractured
axis is for examination of ball-and-sockets on the short sides of
cortical fiber cells. An approximate zone for the abundant distribution
of ball-and-sockets is outlined. In the equatorial region, the
ball-and-socket zone extends at least 300 μm deep from the surface. In
the images, B&S zone, ball-and-socket zone; AP, annular pad; N,
nucleus; AS, anterior surface; PS, posterior surface.