Eyeball Walls Cornea 1/6 Fibrous lavers Sclera 5/6 Choroid 2/3 Eye ball vascular layers Ciliary body Retina
6 Ciliary body Eyeball Walls Fibrous layers Eye ball Vascular layers Retina Cornea 1/6 Sclera 5/6 Choroid 2/3 Iris
D C B ornea M Colorless, transparent 5 layers: epithelium Bowman’ s membrane Stroma Descemet’ s membrane Cornea H&E Low endothelium E· corneal epithelium;D· Descemet membrane :b- Bowman s membrane P-substantia propria
Cornea Colorless, transparent 5 layers: epithelium Bowman’s membrane Stroma Descemet’s membrane endothelium 7
keratin Cori aepithelium Non-keratinized stratified squamous epi. 5-6 lavers Numerous mitotic figures B No vessels Free nerve ending b. Bowman's membrane( anterior Corneal epithelium H&E High arrows-lens fibers(young); basement membrane) P-substantia propria; B-Bowman's An accellular homogeneous membrane Membrane (collagen fibrils) Stability strength, no regeneration
Cornea a.epithelium: • Non-keratinized stratified squamous epi. • 5-6 layers • Numerous mitotic figures • No vessels. • Free nerve ending b.Bowman’s membrane( anterior basement membrane) • An accellular homogeneous membrane (collagen fibrils) • Stability & strength, no regeneration 8 keratin
C Stroma or substantia propria Several lamellae of fine collagen fnetwork Flattened fibroblasts G S rich in chrodroitin sulfate D. Descemet's membrane(posterior limiting lamina) Acellular homogeneous membrane Can be repaired by endothelial cells D E Endothelium M Like mesothelium in its morphology Regulate the water content of the K stroma maintain trans parency Cornea h&E Med E- corneal epithelium; D-Descemet's membrane:b- 's membrane. - substantia propria; K- keratocyte
C. Stroma or substantia propria • Several lamellae of fine collagen f.network • Flattened fibroblasts • G.S.rich in chrodroitin sulfate D. Descemet’s membrane (posterior limiting lamina) • Acellular homogeneous membrane • Can be repaired by endothelial cells E.Endothelium • Like mesothelium in its morphology • Regulate the water content of the stroma → maintain transparency 9
镜图 相邻胶原板 层的纤维方 向垂直 胶原板层 纵断面 胶原板层 横断面
胶原板层电镜图 10 相邻胶原板 层的纤维方 向垂直 胶原板层 纵断面 胶原板层 横断面