Sudden blindness can be the result of accidents or an ingestion of rat poison, if bleeding occurs in the eye as a result. However, there are also infectious causes, as well as hereditary damage to the fundus, glaucoma (glaucoma) due to increased intraocular pressure, hormonal disorders (diabetes mellitus) or high blood pressure.
The disease only becomes apparent when the ability to see in both eyes has completely disappeared. This can happen within hours, for example in the case of an acute glaucoma attack, but it can also develop over days or even more slowly. The dog appears insecure, may run into obstacles or even refuse to move forward if it is not in familiar surroundings. He does not react if, for example, a cotton ball is dropped in front of his nose. The eyes can be completely unchanged, but they can also show significant inflammation or redness and / or greatly dilated pupils.
In such cases, a quick and precise diagnosis is crucial, ideally by a veterinarian specializing in ophthalmology. If the problem goes back to an infection, for example, he will fight the pathogens and the inflammation in a targeted manner. In glaucoma, medication can lower eye pressure. In the case of hereditary causes, blindness cannot be treated, as the destruction of the retina at the fundus cannot be stopped.
Breeds with hereditary eye defects must be subjected to a disciplined breeding selection in order to stop the spread of the genetic make-up. A veterinarian should always be consulted in the event of changes to the eye, e.g. the lens becoming cloudy or rubbing with the paw.
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