Struggling for shuteye? Try wearing a pair of Blue Light Glasses for 90 minutes before bed to filter out sleep-blocking waves from your computer, phone, or tablet. A range of health experts have recommended the use of the blue-light blockers, which work by filtering out the short wavelength rays emitted by electronic devices. New research published in the journal Chronobiology International shows that wearing the special specs for that last hour-and-a-half before lights out can help you get a good night’s sleep.