HOUSTON — Looking at digital devices at night could be ruining our sleep, according to the authors of a new study. <br /> <br />Blue light emitted by electronic devices has a detrimental effect on sleep quality, researchers from the University of Houston report, in a study published in Ophthalmic & Physiological Optics. <br /> <br />Blue light is also emitted by the sun. It activates retinal ganglion cells in the eyes that suppress the body's production of melatonin, the hormone that regulates sleep. <br /> <br />The study found that subjects who wore glasses to block blue light at night experienced a 50 per cent increase in melatonin levels and reported better sleep. <br /> <br />The authors of the study recommend people should wear blue light-blocking glasses at night and switch electronic devices to night mode to improve the quality of their sleep.
