My kitty.
We took Claudia, age sixteen, to the vet last week to have an ear infection treated. The meds took care of the infection nicely. However, we discovered she weighed only 5.19 pounds. She usually weighs around seven pounds.
The blood tests showed that she is healthy. She was eating, drinking water, using the litter box and playing. But yesterday, she went almost blind. She can see a bit, but not much. Her pupils remain dilated. She still eats, drinks and uses the litter box.
I don't know if we should do anything. She may have something that did not show up on the tests, and the vet may not be able to help her. I am wondering if she had a stroke. But everything else is fine!
I wonder also if she had an allergic reaction. Just a few days before all this started, we had two closets lined in cedar. She sneezed a lot. But she recovered after we vacuumed and picked up the scraps. Maybe that was all just coincidence.
Because she is elderly, I don't want to subject Claudia to any more tests or anything invasive. If she is ill, I might just let it run its course, as long as she is not suffering.
Has anyone else had a cat go blind suddenly?
= new reply since forum marked as read
Namely hypertension, diabetes, thyroid problems, kidney problems. All of these potential causes of sudden blindness can be treated except the last cause; reaction to a medication. One antibiotic in particular can cause this - Baytril is the brand name for Enrofloxacin, which is a broad-spectrum antibiotic.
I would recontact your vet.
I hope Claudia recovers and I'm sorry she is going through this.
Take care
fellow cat lover
the bench scientist
She was a small framed black cat. So devoted. I do miss her. Thank you for your kind words. 
