What causes yellow deposits on the sclera?

Yellow deposits on the sclera, known as scleral icterus, are primarily caused by an accumulation of bilirubin, which can result from liver dysfunction, bile duct obstruction, or hemolysis. Conditions such as jaundice, hepatitis, cirrhosis, or certain blood disorders can lead to elevated bilirubin levels in the bloodstream. Additionally, age-related changes or certain medications can contribute to yellowing of the sclera. It is essential to consult a healthcare professional for a proper diagnosis and treatment if such symptoms are observed.