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Progressive retinal atrophy (PRA) is a group of genetic diseases seen in certain breeds of dogs and, more rarely, cats. Similar to retinitis pigmentosa in humans, [ 1 ] it is characterized by the bilateral degeneration of the retina , causing progressive vision loss culminating in blindness.
While there is no unilateral treatment for SARDS [13] researchers at the Iowa State University (ISU) led by Dr. Siniša Grozdanić, a veterinary ophthalmologist at ISU, have successfully restored vision in two dogs who have been in 2007 successfully treated through an experimental treatment by intravenous immunoglobin (IVIg). "Although the dogs ...
Many cases are asymptomatic, however patients many have decreased vision, glare, monocular diplopia or polyopia, and noticeable iris changes. [2] [5] On exam patients have normal to decreased visual acuity, and a "beaten metal appearance" of the corneal endothelium, corneal edema, increased intraocular pressure, peripheral anterior synechiae, and iris changes.
Persistent pupillary membrane (PPM) is a condition of the eye involving remnants of a fetal membrane that persist as strands of tissue crossing the pupil.The pupillary membrane in mammals exists in the fetus as a source of blood supply for the lens.
Corneal dystrophy in dogs usually does not cause any problems and treatment is not required. [2] Suboptimal vision caused by corneal dystrophy usually requires surgical intervention in the form of corneal transplantation. Penetrating keratoplasty is commonly performed for extensive corneal dystrophy.
This is caused due to iris atrophy usually seen in FHI and exposure of the fragile iris vasculature to the vitreous fluid. The sudden change of pressure in the anterior chamber upon suction induced by the paracentesis, or during cataract surgery, causes bursting of the fragile superficial iris capillaries resulting in micro-bleeding.
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