Fig. 21. A. Lens epithelial whole-mount preparation from a normal young adult lens showing the area of the meridional rows. B. the same area taken from a lens with a nuclear cataract. C. The meridional rows of a lens with a posterior subcapsular cataract showing the loss of organization and the posterior migration of cells. The dark strand is a zonule fiber. D. The meridional rows are completely disorganized at the equator in an epithelium taken from a mature steroid cataract. (Streeten BW, Eshaghian J: Human posterior subcapsular cataract. Arch Ophthalmol 96:1653, 1978)