Abstract: A method of providing a stereoscopic 3D image or video on a non-stereoscopic 3D screen. This includes receiving an alternating frame sequence of left and right images where a marker is embedded into the left or the right image. The alternating sequential frame with the embedded marker is output to the non-stereoscopic 3D screen. The markers outputted from the non-stereoscopic 3D screen are detected by an optical sensor. A synchronization signal is sent via a communication channel to an eye control device to synchronize the eye control device with the non-stereoscopic 3D screen, based on the detected markers displayed on the screen.