A poor liver may cause loss of vision in the eyes as well as yellowing of the sclera. The liver is the main site of vitamin A synthesis, and liver dysfunction may result in impaired synthesis of vitamin A. Reduced synthesis of vitamin A can lead to vision loss, such as night blindness, which is caused by vitamin A deficiency. Liver dysfunction may also cause a rise in bilirubin and yellowing of the sclera. Liver function impaired patients should quit drinking in time, alcohol is very damaging to the liver, and advocate eating a high protein, high vitamin and low fat diet, reduce the intake of barbecue, pickled food.