My boyfriends eyes are yellow not white what could it be?

Yellow eyes: Often a yellow hue to the eyes are normal for that person. The best way to tell would be to look at old pictures and see it it looks similar. However, a dangerous cause of yellow looking eyes is liver disease, which should be checked out immediately. This is often associated with yellow looking skin, but sometimes can appear prior to the skin changes. I would suggest he go back to his primary doc.