J.L.
Hi S., have you tried flushing his eyes out with cool water
i don't know if that will help but you can try it. Does` he cry when he is rubbing his eyes, and is it in both eyes. I would take him back in to the ped, or I would just take him to urgent care or to an emergency room, it is both eyes. Do you have pets, that he may be alergic to? it could be anything, but i would take him back in. I pray he gets better. J.