Post #427632 by little lost tiki on Wed, Jan 7, 2009 8:26 AM

Photosensitive epilepsy is a form of epilepsy in which seizures are triggered by visual stimuli that form patterns in time or space, such as flashing lights, bold, regular patterns, or regular moving patterns.Static spatial patterns such as stripes and squares may trigger seizures as well, even if they do not move.Several characteristics are common in the trigger stimuli of many PSE patients. The patterns are usually high in luminance contrast (bright flashes of light alternating with darkness, or white bars against a black background). Contrasts in color alone (without changes in luminance) are rarely triggers for PSE. Some patients are more affected by patterns of certain colors than by patterns of other colors. The exact spacing of a pattern in time or space is important and varies from one individual to another.

Sensitivity is increased by alcohol consumption, sleep deprivation, illness, and other forms of stress...

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