Periodic acid-Schiff’s reagent (PAS) staining of Anableps cornea. 10 μm-thick sections from paraffin embedded Anableps and zebrafish eyes were stained with PAS. A) Dorsal cornea, B) ventral cornea, C) pigmented cornea, and D) zebrafish cornea. DBM, dorsal Bowman’s membrane; VBM, ventral Bowman’s membrane; DDM, dorsal Descemet’s membrane; VDM, ventral Descemet’s membrane; PBM, Bowman’s membrane in the pigmented cornea; PDM, Descemet’s membrane in the pigmented cornea; ZBM, zebrafish Bowman’s membrane; ZDM, zebrafish Descemet’s membrane; the rest of the notations are as in Fig. 1.