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It is known that glaucomatous optic neuropathy is caused by selective cell death of retinal ganglion cells (RGC) by elevated intraocular pressure (IOP) and other causes. In the present study, we investigated RGC death in experimental glaucoma model rats (22 rat eyes) produced by cautery of three episcleral/limbal veins. As controls, 10 rat eyes with normal IOP were used. After cautery of episcleral veins, the average of IOP was significantly higher as compared with controls during 6 months after the operation. The number of retrograde labeled RGCs was significantly decreased in high IOP eyes as compared with normal IOP eyes. Therefore the episcleral/limbal veins occlusion model gave a consistence that long-term elevation of IOP leads to loss of RGCs and is useful as an experimental glaucoma model. LA: Japanese
Dr. T. Ito, Department of Ophthalmology, Hirosaki University, School of Medicine, Hirosaki, Japan
5 Experimental glaucoma; animal models
2.13 Retina and retinal nerve fibre layer (Part of: 2 Anatomical structures in glaucoma)