Report: Sleeping with light from TV, computers, city lights may lead to depression

If you have a habit of sleeping with the television on or the laptop open, that dim light shining in your face may be making you depressed, a recent study suggests.

Researchers at Ohio State University tested two groups of hamsters--- one group was exposed to a normal cycle of natural light followed by sleeping in the dark, and the second group was exposed to a dim, artificial light that mimicked television light or city lights shining through a window.  

After a month, the hamsters exposed to light during their sleep cycles showed signs of depression, TIME reports.

Scientists say the cause of the depression is a chemical reaction.

Melatonin is created during sleep to help brain neurons function properly, but the brain can’t produce the hormone if it detects light.

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