The causes of dark shadows in the eyes are as follows: firstly, it can be caused by intracranial lesions, especially after the lesion of occipital lobe visual center, dark shadows appear in the eyes, and in severe cases, partial blindness and visual defects will occur, which can be diagnosed after the head nuclear magnetic examination. Secondly, it can also be seen in intracranial space-occupying diseases, especially when the optic nerve is compressed in its course, which can cause dark shadows in the eyes. Once again, clinically, it can also be seen in the middle cerebral artery ischemia, especially transient ischemic attack can appear transient darkness. Lastly, if the dark shadows appear in the eyes for a long time, it can also be clinically seen as hemorrhage in the fundus of the eye, such as retinal blood vessel rupture. For fundus hemorrhage, it is recommended to consult an ophthalmologist, and if necessary, drugs to promote blood absorption can be applied.