Looks like he needs a vet appointment to rule out any scratches to the eye. Even if it was not, excessive discharge is not normal and it is likely something else is going on, perhaps conjunctivitis.
If you're speaking about commercial eyedrops, I would not recommend this, but it is likely he will get prescribed some sort of anti-biotic eyedrop.
Hopefully will be pretty simple to treat, but eye issues should be seen by a vet within 24 hours due to the rapidness an eye can deteriorate.
All the best x