https://techcrunch.com/2023/03/28/apple-tvos-16-4-update-dim-flashing-lights-feature/

Apple released the tvOS 16.4 update to the public yesterday, bringing various improvements to the system, including a new “Dim Flashing Light” feature. The new accessibility option can detect flashes of light or strobe effects and then automatically dim the display of a video.

The “Dim Flashing Light” feature is notable since it will likely benefit Apple TV users with light sensitivity or, possibly, users with epileptic seizures. According to the Epilepsy Foundation, 2.7 million Americans have epilepsy, and approximately 3 to 5% of them are photosensitive. Photosensitive epilepsy is when seizures are triggered by flashing lights, patterns or color changes. Flashing lights can also cause headaches and migraines.