Screen Refresh

ISSUE:

Between 1 in 25,000 and 1 in 10,000 people have seizure disorders. Rapidly flashing light — particularly in the 10-25 hz range — can evoke seizures in people with photosensitive epilepsy. Sensitivity to flicker increases with the intensity of the light and the portion of the person's visual field affected. Screen refresh or rapidly flashing images on the screen can trigger a seizure.

Automatic refreshing of a page may prevent access to the information for users of screen-readers, screen magnification applications and individuals with learning impairments. A screen-reader will begin reading a page from the top each time the page is refreshed.

STANDARD:

• Avoid the automatic refreshing of a page.



• A method for disabling the automatic refreshing of a page must be provided.