Weepy eye would be if it stays consistently wet. Right now it could be he just got some debris in his eye that needs to be flushed out. I use plain sterile saline eye drops(eg. natural tears). If the problem continues or worsens, it's likely there is more going on with the eye and your knowledgeable rabbit vet will need to take a look at it. If
you see white sticky discharge, white clouding on the cornea, bulging of the eye, your rabbit stops eating due to pain, or you see any other concerning symptoms, you should contact your vet immediately.