My dog is having the same issue... Neutered and 1 week later he is cross eyed...
My apologies for the sarcasm - it is immature and uncalled for.
Ouch. Sorry, doc. I'm aware it's a human eye forum, just searching...I'm thinking biology, physiology, chemistry, cells, effects...start from the outside of a vague circle and move inward...my question on the subject led me into another human forum in addition to this one, figured it couldn't hurt to ask since God made all his creatures with cells - blood and bone and chemistry. As I stated above, human people reported some similar experiences - maybe they should call their vet.
This is a human eye forum.
Dr. O.