10.2.19: Three flashes or below threshold

Where ICT is a non-web document, it shall satisfy the success criterion in Table 10.19.

Table 10.19: Document success criterion: Three flashes or below threshold

Documents do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds.

NOTE 1: This success criterion is applicable to all content in the document (whether or not there is an alternate accessible version of the document) since any part of a document that does not meet this success criterion can interfere with a user's ability to use the whole document (including a link to the alternate version).

NOTE 2: This success criterion is identical to the WCAG 2.0 Success Criterion 2.3.1 Three Flashes or Below Threshold replacing "Web pages" with "documents", "the whole page" with "the whole document", "the Web page" with "the document" and removing "See Conformance Requirement 5: Non-Interference" and with note 2 above re-drafted to avoid the use of the word "must".

Testing methods

Type of compliance Inspection
  1. The ICT is a non-web document.
  1. Check that the document does not fail the Success Criterion in Table 10.19.
Result Pass: Check 1 is true
Fail: Check 1 is false

There is currently no content classified with this term.

Components that implement this clause

PEAT Photosensitivity Epilepsy Analysis Tool

by Trace R&D Center, University of Maryland

A free tool for analyzing web content to determine if it might cause seizures in those who have photosensitive seizure disorders such as epilepsy.