In vertical gaze palsy, the patient loses both casual and reflex vertical gaze due to superior gaze palsy caused by infarction of the anterior and posterior parietal regions and inferior gaze palsy caused by infarction of the medial and dorsal aspects of the red nucleus. If the posterior part of the superior colliculus is damaged, the inferior vision of both eyes is not possible. What are the preventions of binocular hypotropia? 1. Early to bed and early to rise, exercise the body. Lack of sleep will reduce the body’s immune function, but also easy to excite the fire, resulting in external internal injuries. 2, keep a calm state of mind. Spring avoid anger, do not be too impatient, to keep a calm state of mind from time to time. 3, pay attention to lifestyle habits, it is best to early detection and early treatment. 4.Avoid smoking. Smoking is a well-known cancer-causing factor, which is related to 30% of cancers. Cigarette tar contains many carcinogenic substances and carcinogenic substances, such as 3-4 benzpyrene, polycyclic aromatic hydrocarbons, phenols, nitrosamines, etc. When the smoke of tobacco combustion is inhaled, tar particles are attached to the bronchial mucosa, which can induce carcinogenesis after long-term chronic stimulation. Smoking mainly causes cancer in the lung, pharynx, larynx and esophagus, but also increases the risk of tumors in many other areas. A fair diet may have a preventive effect on most cancers, especially since there are a variety of cancer-preventive ingredients in plant-based foods that are effective in preventing almost all cancers. Smoking is most likely to damage the surface barrier of the respiratory tract and trigger an attack of the disease. Tobacco, alcohol and coffee stimulate nervous excitement, and some people want to use them to “eliminate tension and fatigue”, but in fact, they weaken the body’s resistance to disease. 5, pay attention to work safety and strengthen labor protection, to avoid trauma is essential. Pay attention to personal protection to avoid unnecessary injuries. Once the trauma, please timely medical examination, clear diagnosis, and correct treatment and treatment, to avoid the occurrence of secondary injuries, but also to avoid the emergence of old injuries, to the treatment and prognosis do not bring the impact.