I wonder what the PWM frequency is for teh "flickering"? I'm constantly distracted by light flickering in my peripheral vision. Computer monitors, traffic ligh

I wonder what the PWM frequency is for teh "flickering"? I'm constantly distracted by light flickering in my peripheral vision. Computer monitors, traffic lights, car head and tail lights. Many modern LED lights are already flickering. It's often impercetible in my focused vision, but in peripheral vision is clearly visible. I think it should be in the KHz at least...