PWM is only a problem if the frequency is low. If the frequency is higher than the frequency response of the light sensitive molecules in your retina, it is no

PWM is only a problem if the frequency is low. If the frequency is higher than the frequency response of the light sensitive molecules in your retina, it is no different from DC from a biological point of view. Claiming otherwise would be on the same level as audiophiles claiming to hear ultrasound. Please don't try to paint entire classes of technology as unhealthy just because some low quality implementations are. PWM is a fundamental technique in electronics and displays and there is nothing wrong with it at that level. Nobody gets migraines from > 1kHz PWM. If your backlight is doing 60Hz PWM then you might want to get a better display.