“If you close your eyes, turn your head left or right, up or down, then, saying click, open and close your eyes very quickly, you will experience the photographic moment. It’s like that inside a camera when the shutter clicks. When I tried it, I noticed a sudden rush of light and a jumble of objects. A student once said that more than noticing that the world was still there, she noticed that she was still there. I see therefore I am. Closed eyes are the state of dreams; only interior visions are possible then. When the eyes are open, an awareness of dreams and the interior life is stilI possible, but awareness of the external world is possible only with open eyes. And therefore, the fullest experience of life is possible only when one is awake and with open eyes, out on the streets of the world.” - Charles Harbutt as quoted in http://pdnpulse.pdnonline.com/2015/07/charles-harbutts-travelog-the-best-essay-ever-about-photography.html.
I tried it and totally agree with both the author and with the student mentioned in the quote. Try it yourself!