Anemia refers to a clinical syndrome that occurs when the volume of red blood cells in the peripheral blood is lower than normal. Fundus observation is helpful in diagnosing anemia. In anemia, observation through fundus can reveal poor filling and light color of blood vessels in the fundus, which can be helpful in the determination of anemia. However, it is rare to determine anemia by observing the fundus clinically, because observing the fundus requires fundoscopy, which is more troublesome to operate. It is also easier to detect anemia by observing other organs, such as observing whether the patient’s face is pale, and whether the lips of the mouth, earlobes, and tip of the nose are pale, so that a general judgment of anemia can be made. In addition, observation of the lid conjunctiva is also one of the common areas to determine anemia. Also, observing whether the patient’s nail bed is well filled and whether the palm lines are well filled with blood is also one of the common areas to observe whether the patient is anemic.