[Ultrastructural observations of the retinal pigment epithelial cells and the outer segments of the rod visual cells after vortex vein occlusion in rabbit eyes].
The effect of occlusion of the vortex vein to the retinal pigment epithelial cells (RPE) and the outer segments of the rod visual cells (OS) of albino rabbits was observed by scanning electron microscopy. Three vortex veins of the left eye and two vortex veins of the right eye in each rabbit were ligated with 6-0 silk suture. The morphological changes were observed at 24 hours, 1, 2, and 4 weeks after the ligation. The changes of RPE showed no significant difference between ligation of 2 and 3 vortex veins. The RPE showed degenerative changes 1 week after the ligation and the degenerative changes became severe after 2 weeks. The OS, showed no change after 2 vortex veins occlusion, while after occlusion of 3 vortex veins OS revealed degenerative changes after 1 week and the degenerative changes reached a maximum after 2 weeks. The changes of both RPE and OS tended to return to normal at 4 weeks. The changes of both RPE and OS may be caused by reduction of the blood flow in the choroidal circulation.
Kadomoto
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D000818:Animals; D002829:Choroid / Q000098:blood supply*; D015862:Choroid Diseases / Q000473:pathology; D008026:Ligation; D008855:Microscopy, Electron, Scanning; D010786:Photoreceptor Cells / Q000648:ultrastructure*; D010857:Pigment Epithelium of Eye / Q000648:ultrastructure*; D011817:Rabbits; D012374:Rod Cell Outer Segment / Q000648:ultrastructure*; D014680:Veins