Staring at your TV screen or phone until you fall asleep is not only bad for your eyes and brain, as studies show that the dangerous habit can lead to major health issues. Technology can be used for good and bad. But not knowing how to use it correctly can also have adverse effects. You may not realize it, but sleeping with your favorite show running on the TV or a video on your smartphone can reduce your lifespan. How light from TV and smartphones affects health ER doctor John Whittington explains the harmful effects of light from TV and smartphones, especially at night, quoting a study from …