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Yes you are right that Vigamox is a fluoroquinolone class antibiotic and would be intended to help with a bacterial infection..
You note above that you awoke with A red eye.. so one was red and the other not? That pattern would more fit with a BACTERIAL CONJUNCTIVITIS as possible. Viral conjunctivitis is possible as well but these are more often bilateral at onset ...
It may be that your upper respiratory infection might be better covered too by an oral antibiotic >> that would be a very possible scenario...
It could be from a physical irritation..
So there are possible irritations that may not be benefiting from the prescribed antibiotic. The eye drops were prescribed I think to cover a base with the understanding that other causes may self resolve without need of treatment..
The Rx is for bacterial conjunctivitis also referred to as "pink eye"
The discharge sounds suspicious for this to be a bacterial conjunctivitis. It does not have to meet a high threshold for it itching or being extremely red however...
I hope that this is helpful for you! let me know if you have further questions. If my answers have been helpful and to your satisfaction then please remember to leave positive feedback. Thank You and Best Regards,
Anthony Bray MD