Flickering in the eyes may be caused by retinal diseases, intracranial diseases and so on, as follows: First, retinal diseases: common are retinal diseases, for example, there are some highly myopic eyes, or retinal degeneration caused by trauma or inflammation. If there is degeneration, when turning the eye or looking at objects, the corresponding lesioned area is stimulated to cause the sensation of flickering. For example, in highly myopic eyes, the retinal degeneration area, there is a posterior pull of the vitreous, every time you turn the eye there will be a flickering sensation, this is usually the retina has disease. Second, intracranial disease: flicker in looking at things is considered intracranial disease, to the inflammation, edema, compression of the skull, especially the brain’s occipital cortex is stimulated, will also cause the eyes to look at things with flicker, as well as double vision, phantom vision and other phenomena.