The reason we blink? Most of the time it"s so our brains can switch off

The reason we blink Most of the time it's so our brains can switch off When we blink, our brains goes into idle mode where thoughts wander freely, say Japanese researchers These mental breaks can last anywhere from a split second to a few seconds before attention is fully restored Most of us take between 15 and 20 such moments of downtime per MINUTE By Emily Payne PUBLISHED: 19:00 GMT, 2 January 2013 | UPDATED: 19:01 GMT, 2 January 2013 We spend around 10 per cent of our waking hours with our eyes shut.