Why are you waisting time on here take him to the er.
You definitely need to have a doc check him out. I had this problem last month with my son and it turned out that he had an ear infection that caused his liver to over produce which made his eyes yellow.
I agree with wanabb.
Yellow eyes indicate a potential liver problem. You need to get your son seen by a doctor asap - this is not something to wait around on.
I would have a doctor look at him. Yellow color can be liver problems and any blood in his stool should be addressed as soon as possible. I hope it's nothing serious but still worth getting him checked out.