Cortical blindness is a central visual dysfunction caused by toxins affecting the occipital cortex of the brain or vasospastic ischemia, with vasospastic damage being the most common. Clinical manifestations include complete loss of vision in both eyes, normal pupillary light reflex, normal fundus, and may include hemiplegia. The disease is common in children aged 2 to 6 years. Modern Western medicine generally uses corticosteroids and vasodilating drugs, but the effect is not very satisfactory. It is a bilateral damage above the lateral geniculate body, including lesions on both sides of the occipital lobe and optic radiation. The clinical characteristics are: 1) total blindness in both eyes; 2) intact pupillary light response; 3) normal fundus and abnormal VEP examination. Western medicine believes that cortical blindness is caused by visual cortical lesions. It has the following characteristics: 1) double blindness, including no transient response to intimidation and bright light in light and darkness, and no tracking of objects; 2) no optic nerve atrophy in the fundus, and the retina maintains normal structure; 3) the presence of light reflex and convergence reflex (the reflexes of convergence (convergence) and pupil narrowing (adjustment) when gazing at near objects); 4) free eye movements; 5) cortical blindness denies blindness, memory and orientation disorders ⑤ cortical blindness denies blindness, memory and disorientation, and mental abnormalities such as hallucinations. Etiology: There are many clinical causes of cortical blindness, the most common causes are cerebrovascular lesions, inflammation, demyelination, tumors, craniocerebral trauma, carbon monoxide poisoning, transient cardiac arrest, post-epileptic seizures, post-cesarean section, hypoxia during delivery, and other rare causes such as organic mercury poisoning, complications of cerebral angiography, cerebral leukomalacia after organ transplantation, and complications of acute glomerulonephritis. Occipital cortical blindness can be divided into 3 types according to clinical manifestations: (1) simple visual impairment: manifested as blurred vision, hemianopsia or blindness, other visual symptoms and visual field defects, without other neurological symptoms and signs; (2) visual impairment with other hemispheric symptoms and signs, such as hemiparesis, hemianesthesia and aphasia; (3) visual symptoms with sub-screen symptoms: such as vertigo, nystagmus and ataxia, etc. Treatment: Treatment of cortical blindness is mainly to treat the cause of the disease. Our hospital has developed water acupuncture therapy based on acupuncture to achieve better results in the treatment of cortical blindness. Water acupuncture treatment mechanism: 1, water acupuncture stimulation of the visual area of the head can increase the local blood flow, change the cortical ischemia and hypoxia, improve the oxygen uptake capacity of brain tissue, and promote the repair of damaged neurons. 2, head water injection can activate brain cells and promote brain cell function compensation. Cortical blindness has poor healing, but early treatment is effective, so improve the understanding of the disease, to achieve early diagnosis, early treatment, can improve the clinical cure rate, improve the symptoms and improve the quality of life of patients.