| The symptoms of ocular migraine can also be | | | | - Halos or Auras - an atmosphere of light, dust or |
| classified as migraine auras. A migraine aura is a | | | | smoke surrounding objects, specifically light |
| definite sign that a painful migraine headache will | | | | objects. |
| follow. It is a symptom that let migraine sufferers | | | | - Floating or Flashing Lights - these can be colored |
| know ahead of time that a headache is about to | | | | or white spots that appear to move. |
| manifest itself. Some people will have "pre" | | | | - Lightning Bolts - a spiked or zigzag line that |
| symptoms for a couple of days that will signal | | | | flickers and/or arcs over the field of vision; with |
| them that an agonizing headache is on its way. | | | | the regularity and intensity increasing over time |
| Aura effects can develop for about 6 minutes | | | | until the person can no longer see; this light show |
| and generally can appear from twenty minutes to | | | | usually ends with the beginning of headache pain. |
| an hour before the start of a headache. They are | | | | - Photophobia - a severe sensitivity to light; this |
| evidence of what used to be called "classic | | | | light effect repeatedly lasts the extent of the |
| migraine". Currently, medical practitioners came up | | | | headache. |
| with a more scientifically accurate term, migraine | | | | Most aura episodes last less than an hour. Migraine |
| with aura. Only less than 20% of migraine | | | | sufferers who experience auras that last more |
| sufferers consistently experience any kind of aura | | | | than an hour are told to suffer from migraines |
| before a headache begins. | | | | with continued aura. In some cases you may |
| Symptoms of ocular migraines - aura effects | | | | experience aura effects without developing a |
| Most migraine auras can be seen with the eye | | | | headache, but it's still believed to be a symptom |
| (visual). These effects are called positive visual | | | | of chronic migraines. At different times you may |
| phenomena because rather than their vision gets | | | | experience all three variations, migraine with aura, |
| hazy or goes dark, people who see them | | | | migraine with extended aura, or a common aura |
| experience the following: | | | | without the headache. |