“The German poet Novalis said that the eye is a ‘superficial’ organ. That is indeed partly true.”
Gianni Sarcone (1962) Italian author, artist, designer, and researcher in visual perception and cognitive psychology
I will even add that it is an external organ: the eye with which we see the world is a part of the world itself. As soon as we open the eye, whup, the world pops in it!
Curiopticals (2009).