From the fetal period to the neonatal period, due to the low resistance placental blood circulation caused by the ligation of the umbilical cord at birth, the increased resistance and blood pressure of the body circulation, the establishment of autonomic respiration and blood circulation need process, therefore, from the fetus to the newborn to go through this transition period, that is, from birth to the physiological smooth period, an average of 8-12 hours. Common ocular complications during the excess period: Within one week of birth, the coagulation function of the newborn is not yet complete, the plasma prothrombin as well as the coagulation factor function is low and there is a physiological decrease in coagulation factors, combined with the incomplete development of the elastic fibers of the blood vessel wall and the fragility of the vessel wall, various bleeding situations are more common. Ocular: bleeding in the eyelid/orbit/subconjunctiva, retinal hemorrhage …… Retinal hemorrhage is mostly oozing or punctate, the amount of bleeding is often small but the bleeding is widespread and scattered, and in severe cases, it can cause a large area of bleeding.