Fig. 1. (A) Diffuse illumination slit-lamp view of the human cornea. (B) Slit-beam illumination slit-lamp view of the human cornea shows an optical section of the tissue. Notice the slight light scattering that occurs in the tissue, mainly from cellular components in cornea. (C) Histologic diagram of the major cellular and extracellular matrix components of the human cornea (toluidine blue 25×).