CausesTo date, the cause of their appearance is unknown, but it is thought to be due to a spasm in the blood vessels of the retina or due to changes in the nerve cells in the retina. A personal or family history of migraine is also considered.
SymptomsPeople who experience ocular migraines may experience visual symptoms for 10 to 30 minutes before the onset of a migraine. The symptoms are in the form of:
- The appearance of a “blind spot” that gradually increases
- Accompanied by seemingly flickering lights or
- Surrounded by wavy or zigzag lines
- Some people even describe psychedelic images.
- Numbness or tingling in the hands or face;
- Impaired sense of touch, taste or smell;
- Blind or blurred point in the field of view.