I personally think that wetness looks suspicious. It looks kind of 'goopy', like it might even have some yellow in it. Could be a simple bacterial infection of the eye duct (although I don't see any swelling), or a scratched cornea or some other irritant. I believe most people will recommend that you start by wiping the eye with a wet teabag, then maybe applying some terramycin ointment for a few days (terramycin can be ordered online). Let other folks chime in, but that would be my suggestion.