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You are sitting at your desk reading your email. Nothing particularly exciting or irritating turns up in your inbox. Or, maybe you are packing up the car for a family outing, looking forward to a fun filled Sunday afternoon.

Suddenly, and without warning, bright, jagged edged lights appear in your line of vision. Closing your eyes you can see the outline of a pattern that stands out from the black background.

There's no pain, yet, but you know it's coming. Over the next few minutes or even hours, the image will slowly move across your field of vision until it disappears off the field. When it does, the excruciating pain strikes along with nausea and intense sensitivity to light.

You are sitting at your desk reading your email. Nothing particularly exciting or irritating turns up in your inbox. Or, maybe you are packing up the car for a family outing, looking forward to a fun filled Sunday afternoon.

Suddenly, and without warning, bright, jagged edged lights appear in your line of vision. Closing your eyes you can see the outline of a pattern that stands out from the black background.

There's no pain, yet, but you know it's coming. Over the next few minutes or even hours, the image will slowly move across your field of vision until it disappears off the field. When it does, the excruciating pain strikes along with nausea and intense sensitivity to light.