Groups of adult nuclear secondary fiber cells (N = 25 secondary fiber cells). Imaginary pole is included to facilitate perception of lens shape. (A) Opposite end curvature of adult nuclear and cortical fibers is less pronounced than in fetal nuclear secondary fibers. (B) Arrangement of adult nuclear fibers to form anterior suture branch of star suture. (C) Symmetric sutural latticework formed by offset anterior end posterior sutures in single adult nuclear growth cell.