i asked the vet when Princess had her stitches removed, about why she's got shakey eyes. it's called Nystagmus. she said it was possibly triggered by the anaesthetic, as she hadn't had it before the neutering. it's not a bad case of it, & it's getting better now.. it's gone from fast to quite slow now, which means she wont have to go back in 3 weeks time if it's gone.