Sudden Blindness From Chorioretinitis in a Terrier Mix
by A reader
We are very distraught that our 10-year-old, who usually acts like a puppy, suddenly has no sight and is obviously depressed. His blood counts were normal, and a tick disease test was normal too.
I understand the causes are many, but I would like an idea of the prognosis. The vet will do another eye exam in a week, hoping the inflammation goes down. She didn't mention retinal detachment, but explained that she can't tell how much damage there is yet and that some healthy cells can recover. Any feedback on his current treatment and prognosis would be greatly appreciated. I worked in healthcare for
I'm sorry. Sudden vision loss is frightening. Chorioretinitis is inflammation at the back of the eye, and it is often a sign of something affecting the whole body, such as an infection (including tick-borne and fungal infections), an immune problem, or, less often, cancer. Many cases are never fully explained. A calming pheromone collar is very unlikely to cause it.
Prognosis depends on how much the retina was damaged and whether it detached. Some dogs get useful vision back as the inflammation settles, especially when treatment starts early, while others are left with partial or no vision. The follow-up exam is the best guide. Ask whether the retina looks attached, and whether any vision has returned.
A second opinion is reasonable. Ask about a broader infection panel, including fungal and other tick-borne diseases, a blood pressure check (high blood pressure can damage the retina), and chest X-rays. Make sure he gets the steroid exactly as directed and isn't stopped suddenly.
Dogs adapt to blindness better than people expect, and the low mood often lifts within a few weeks. See dog eye problems.
This is general information, not a diagnosis. Please follow your own vet's advice.
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