Images blinkings

In the television apparatuses the sfarfallio produced from the continuous one I redesign of the image (50 times to the second but in interlacciato way, that is they come before designed to all the equal lines and subsequently all the uneven lines, than in practical door the 25 frequency to Hz) can in some subjects be triggering cause of epilettiche crises. They are available systems in order to reduce this risk.