Anemia is a syndrome in which the volume of red blood cells in the peripheral blood is lower than normal and various clinical manifestations occur. When anemia occurs, there are three common symptoms in the eyes: i. Patients can have blurred vision because the blood and oxygen supply to the brain decreases in anemia, and at the same time the oxygen received by the optic nerve also decreases, and patients will have blurred vision and blurred eyes, which is one of the earliest symptoms. Pale lid conjunctiva, because in anemia, more blood flows to the heart, liver, brain, kidneys and other important organs through regulation, and the blood supply to the mucous membrane of the skin is relatively reduced, so there will be pale lid conjunctiva. If the anemia is caused by excessive destruction of red blood cells, the sclera will be yellowish because the lysis of red blood cells will produce a lot of indirect bilirubin, which exceeds the processing capacity of the liver, and the sclera will be yellowish.