Affections de la rétine

After giving an outline of the knowledge required in the study of retinal diseases (anatomy, physiology, definitions), the followings in different mammalian species (dog and cat, horse, food animals) are described (retinal dysplasia: aetiology, pathogenesis, signs and what should be done when dealing with retinal dysplasia; inherited degenerations of external retinal layers (first aetiology and pathogenesis, then results of clinical examination - age of onset, search for visual impairment [midriasis and reflexes, visual behaviour], ophthalmoscopic findings - are described; finally how to detect a form of progressive retinal atrophy is summarized); acquired diseases of the retina (chorioretinis) (in a specy, the onset and the appearance of lesions depending on the stage of the disease are non specific relative to their causes, which are then listed in the different species: infections, parasites, trauma, immune-mediated diseases, systemic hypertension, neoplasia; fundamentals of diagnosis and treatment are finally presented); acquired diseases of the retina-toxic retinopathies: they are either iatrogenic or accidental; acquired diseases of the retina: nutritional and metabolic diseases such as vitamin E deficiency in the dog, taurine deficiency in the cat, vitamin A deficiency in cattle are succinctly studied; sudden acquired retinal degeneration in the dog is lastly described.