Sudden acquired retinal degeneration

50 Sudden acquired retinal degeneration


General clinical examination will reveal a lethargic, slightly overweight or even obese patient but no other specific abnormalities. The patient will be obviously totally blind – reluctant to walk, bumping into objects, head down smelling the floor and with a high stepping gait. There will be a ‘starey’ appearance to the eyes, due to the presence of dilated pupils. Menace responses will be absent. Pupils will be dilated in room light and in the dark, and will be symmetrically so. Pupillary light reflexes are usually totally absent, although slight pupil constriction might occur with a very bright light source. Dazzle reflexes will be absent.

Intraocular examination will be normal – one would expect fundus abnormalities but this is not the case – the retina and optic nerve look normal initially. However, if the patient is not presented for several weeks the early signs of retinal degeneration, with tapetal hyper-reflectivity and blood vessel attenuation, might have developed.

Possible causes of central blindness include:

Sep 10, 2016 | Posted by in SMALL ANIMAL | Comments Off on Sudden acquired retinal degeneration
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