Kitten has dilated eyes, twitchy eyes, and off balance

Hello!! I have a kitten who I brought home not even a week ago and seemed perfectly fine.. happy lovely.. he slept alot.. but I didn't think anything about it... but now suddenly he is off balance, his head is constantly tilted to the left, and his eyes were twitching a bit... now they are dilated.. even in bright light... at first before his eyes were dilated we were pretty sure from internet research it was an ear infection... so is his dilated eyes another side affect? or is it something more serious...
Thanks!

[Thomas Dock, CVJ, Vet. Technician]

HI there...this sounds like a pretty serious situation that needs some expert attention.  I would advise you to go to your veterinarian as soon as possible.

Did you, by any chance, use a flea product on the kitten recently?