Dull and yellow eyes may be a normal phenomenon, or it may be caused by malnutrition, jaundice hepatitis and other reasons. 1. Normal phenomenon: with the growth of age, the eyes are stimulated by ultraviolet rays for a long time, or long time watching electronic products, staying up all night and other causes of visual fatigue, which can lead to the patient’s eyes appearing dull and yellowish performance. 2. Malnutrition: long-term malnutrition of the patient’s body leads to vitamin deficiency, resulting in bilirubin metabolism disorders, which can cause elevated serum bilirubin concentration, thus the patient can have the symptoms of dull eyes and yellowing. 3. Jaundice hepatitis: patients with jaundice hepatitis will also have dull, yellow eyes, mainly due to the bilirubin in the liver uptake, transportation, transformation, excretion and other processes of obstacles, resulting in direct bilirubin and indirect bilirubin in the blood exceeds the normal range and deposition in the sclera of the eyes and caused. It is recommended that patients with dull, yellow eyes should consult a hospital in time to assess their condition and undergo treatment under the guidance of a doctor.