Pediatric cyanoblindness is the Chinese medical term for what is known as cortical blindness in Western medicine. 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 causes of cortical blindness are many, the most common causes of cerebrovascular lesions inflammation, demyelination, tumors, craniocerebral trauma, carbon monoxide poisoning, transient cardiac arrest, after seizures, after cesarean section, hypoxia during delivery, and organic mercury poisoning, cerebral angiography complications, organ transplantation immunosuppressant use of cerebral leukoencephalopathy and acute glomerulonephritis, one of the complications of the rare causes. So, how does pediatric cyanoblindness come to be examined? The following is a brief introduction. The main method of checking cortical blindness is to carry out a binocular vision examination, such as the complete loss of binocular vision that is blackout, but the pupil to the light reflex is normal, and funduscopic examination is also normal, can be diagnosed as cortical blindness. In addition, some psychogenic visual disorders, such as emotionlessness and loss of self-awareness, may also be caused by cortical blindness. Visual evoked potentials (VEP) can also be performed to confirm the diagnosis. Cortical blindness has a poor prognosis, but early treatment is good, it is recommended that patients go to professional hospitals as soon as possible for systematic treatment, so as to achieve early diagnosis and early treatment, in order to improve the clinical cure rate, improve the symptoms, and improve the quality of life of patients.