He may have an abcess behind or around the eye which may be
putting pressure on the eye. If possible you should try using plain eye
wash and rinse out the eye. It would be better not to put the neosporin
in the eye. You can use a dilute betadine solution to rinse the eye out
instead. This will also have a antibacterial effect if this is an
infection. If he has a scratched eye then he may need to be seen by
your vet for the correct eye medication.
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