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Accessibility Checkpoint Don't use large flashing images


Web pages must not contain large images that flash more than three times in any one second period.


Flashing areas larger than 21,824 square pixels can trigger seizures in people with photosensitive seizure disorders like photosensitive epilepsy.

Applicable standards

Note: Section 508 (2000) checkpoints (a) through (k) are equivalent to WCAG 1.0 level A checkpoints. Section 508 Refresh (2017) checkpoints are equivalent to WCAG 2.0 level AA checkpoints.

Change history

This page describes a web site issue detected by SortSite Desktop and OnDemand Suite.

Rule ID: AccWcag2-2.3.1-1