Taken together, approximately 40 minutes per day you blind

Not that your eyes are not working. In fact, your brain locks and handles of the images coming from the retina. Each time the eye movements when you transfer the focus from one object to another, the brain transmits dynamic blurry images that do not contain useful information and could cause dizziness. In English this is called «Saccadic masking».

However, you do not cease to see those fractions of a second, while I focus. Tricky brain replaces dynamic static image, recording on this time last "picture" that you have seen, until his gaze. Thus the "lost" about 40 minutes a day when you do not see something that reflects your retina and lovingly outstretched brain "picture" outdated for a split second.

via factroom.ru