Disney has re-edited its new Pixar film Incredibles 2 to ensure it passes a test around flashing lights and patterns. The test is called the Harding Box test, and it is used to look at video footage for flashing lights and patterns that may trigger a seizure in people with photosensitive epilepsy.
This followed concerns raised when the film first aired in the US, about some scenes which could cause seizures in people with photosensitive epilepsy. Some US cinemas posted warnings to audiences at the time.
Since then, Disney has re-edited the film to comply with the Harding Box test. The re-edited version has reduced flashing images to comply with the test.
Disney UK has confirmed that in the UK, the re-edited version has been the only one released. There are no photosensitive epilepsy warnings on the re-edited version as it is no longer considered necessary.
Although the re-edited film is compliant with the Harding box test, Epilepsy Action advises that different people will be affected by lights at different flash or flicker rates. Lights that flash or flicker between 16 and 25 times a second are the most likely to trigger seizures. But some people are sensitive to rates as low as 3 or as high as 60 flickers a second.
There is more information on photosensitive epilepsy on the Epilepsy Action website.