Ever worried about using smartphones and tablets at night affecting your eyes or sleep patterns? Do you love to read e-books on smartphones or tablets late at night but are worried about the negative results of the blue light exposure? Take heart, as according to a study, ample exposure to daytime light may help combat sleep disturbances associated with the evening-time use of electronic devices. The findings showed that daytime bright light exposure, by means of outdoor activities or light interventions in offices, did not affect sleep in young healthy students who used a self-luminous tablet for two hours in the evening time. "Our most important finding was that the issue of whether screen light in the evening could interfere with your sleep is more complex than previously highlighted and that there are certain important factors (such as daytime exposure to light) that affect this," Frida Rangtell, doctoral student at Uppsala University in Sweden, was quoted as saying to