Using iPad at night 'could trigger depressio

Using your iPad or watching television late at night could make you depressed, according to a study that shows exposure to bright light during sleeping hours affects behaviour and stress levels.

American scientists found that mice regularly exposed to light at night became ‘depressed’ - showing less interest in doing ‘fun’ things, being less likely to explore new objects in their cages and not moving around as much. They also had higher levels of cortisol, the stress hormone.

http://www.telegraph.co.uk/health/healthnews/9677947/Using-iPad-at-night-could-trigger-depression.html