Generally speaking, vomiting will not cause yellow eyes, because vomiting is typically caused by severe pain, multiple sclerosis, high blood pressure and so on, and severe vomiting may just result in many other effects on eyes, such as swollen eyes because of high pressure on muscles, blood shot because of subtle blood vessels, pain in eyes because of muscle tensions, etc. While usually yellow eyes is a sign of a very serious disorder and disease that caused by gallstone and jaundice. Due to the accumulation of too much bilirubin put out by the liver, that's why your eyes become yellow. In addition, many other diseases such as cancer of the pancreas, bile duct obstruction, cirrhosis of the liver and sickle cell anemia can also can lead to yellow eyes. Therefore, if you suffer from yellow eyes, you'd better visit a doctor.