From gfreking
https://en.wikipedia.org/wiki/Hawk-Eye
http://www.d.umn.edu/~csigler/PDF%20files/bradbury_veldt.pdf
From liangwang
https://en.wikipedia.org/wiki/Scotoma
(https://en.wikipedia.org/wiki/Blind_spot_(vision)
From Alex
https://en.wikipedia.org/wiki/Qualia
http://www.iep.utm.edu/qualia/
http://plato.stanford.edu/entries/qualia/
From Tyler
https://www.youtube.com/watch?v=LkfPa-tXdbk
http://www.iri.upc.edu/groups/perception/sensorimotorIROS15/
From bsprecher
http://www.wired.com/2015/04/computer-cared-makes-smile/