Q: Hobie, my middle-aged indoor-outdoor cat, awoke this morning with one very abnormal eye. His upper lid droops, and a white film covers the inside corner of the eye. What caused this? Will it resolve on its own, or should I take Hobie to his veterinarian?
A: I'd advise a trip to the vet. It sounds like Hobie has Horner’s syndrome, which is not a specific disease but the name of a group of clinical signs.