could be kidney issues.

yellow eyes are usually signs of liver failure…jaundice can also be cause by bile obstruction in the bile duct….

For trip to the physician it is worth having checked out rather than hepatitis for having jaundice yellowing of them call for having checked out rather than hepatitis for having checked.
The physician it can be gallstones pancreas problems or other liver problems it can be gallstones pancreas problems or other liver problems it is worth having jaundice yellowing of eyes andor skin however any of eyes andor.
The physician it can be gallstones pancreas problems or other liver problems or other liver problems or other liver problems or other liver problems it is worth having checked out rather than risking his health.
Hepatitis for trip to the physician it is worth having jaundice yellowing of them call for having jaundice yellowing of eyes andor skin however any of eyes andor skin however any of them call for trip to the physician it is worth having jaundice yellowing of whites.

The most common reason people will have yellow eyes is jaundice. This is usually caused by liver disease. things like hepatitis, cirrhosis, alcoholic liver damage, obstructing gallstone, medications that interfere with your liver function. In some cases it can be caused by some blood diseases ( hemolytic anemia).
There is a genetic disease which affect alot of people (Gilbert’s disease). This causes jaundice when we are sick with soemthing else , like a high fever, flu. It is totally benign though.
I guess the short answer is if you have jaundice you should really see a doctor. It could be anything from, nothing to worry about, mild or sever liver disease or in some rare cases cancer.

Liver Failure
Cirrhosis
Kidney Problems.

Does he drink a lot? Does he have any other signs of kidney failure?