Experimental glaucoma in the dog

Abstract

Experimental glaucoma was produced in rabbits and monkeys

as an effort to explain the mechanisms of this disease. Spontaneous animal model of glaucoma has also been used. Many technics were employed to produce chronic intraocular pression (IOP) elevation. Fixed autologous red blood cells were used to produce elevated IOP in rabbits and monkeys. In this paper we present the results of the elevation of the IOP in 12 mongrel dogs injecting autologous red blood cells (RBC) fixed in 5% glutaraldehyde in phosphate buffer pH 7.0. The RBC were injected into the left eye following paracentesis and under surgical microscope. The right eyes were controls. Schiötz tonometry was performed, each 24 hours, with the dog in the sitting position. The calibration table Schiötz tonometry in dogs from PEIFFER JUNIOR et al.¹³ (1977) was used. The enucleated eyes were freezed and measured the sagittal and transversal diameters. The eyes were fixed in 10% formalin and sections were stained with hematoxilin-eosin for histological examination. The fixed RBC injected into the anterior chamber produced elevation in the IOP with buphthalmus and keratitis. The IOP was increased in all dogs when compared with the controls, the same occured with the eyes diameters. The pathologic findings were suggestive of glaucoma.