Scintillating scotoma (synonym - orbital migraine) is a neurological disease that manifests itself as partial loss of vision. Scotoma is a temporary phenomenon that can occur under various conditions. Scintillating scotoma is observed in patients with orbital migraine and is associated with vascular changes in the eyes, which leads to temporary disruption of blood flow.
It is important to note that scintillating scotoma is a symptom of migraine, which belongs to the category of headaches of neurological origin and is characterized by a high prevalence in the population. Facial pain or tension pain in the face can also cause flickering symptoms, but they are usually different from migraine symptoms. Scotoma is a rare symptom that occurs in only a small percentage of people. For some people, scoliosis may not cause pain or discomfort, but for others it can be very severe and lead to a decrease in quality of life.
Scotoma flickers mainly at the edges of the visual field, in the form of lines, dots or halos around objects. It can be temporary or permanent, appear with flashes of light, movement, or can be present constantly. This can happen in both eyes at the same time or in just one. Most patients with orbital migraines report that their flashing scotoma precedes an attack of migraine headache, which can occur anywhere on the head and be accompanied by other symptoms. In the pathology of scintillating scotoma, there is a relationship with a previous viral disease or other causes causing CNS disorders. In patients without pathology, blinking is absent. At one time, this phenomenon was characteristic of acute catarrh of the optic nerve, after which obsessive blinking is also called atypical Foster-Kennedy syndrome. Today, this disorder is associated with flickering of the eyeball due to
Scintillating scotoma is a visual field defect in the form of a narrow strip or small area in the area of the retina that is most sensitive to light. It most often occurs suddenly due to a malfunction of the optic nerve or visual cortex of the brain.
The causes of scintillating scotoma are unknown, although there are several theories and versions. Some scientists associate its appearance with genetic disorders of the development of nervous tissue. Others believe that scintillating scotomas may occur with neurological diseases such as migraines, epilepsy, multiple sclerosis or stroke. Autoimmune processes play a certain role in their development. In some cases, scintillating scotoma can be triggered by chemicals such as alcohol, drugs, and even some medications.
Symptoms of scintillating scotomas depend on the type of visual field impairment. They can be sudden and vary in duration and frequency. Flickering scotomas, especially those occurring in the center of the visual field, impair the driver’s ability to judge the distance to an approaching object and stop in time in front of an obstacle. Also, flicker can significantly complicate the work of doctors when conducting research and making a diagnosis if such a disorder accompanies another disease, for example, glaucoma.