User blog comment:Bkharvey/Things I don't understand/@comment-34640406-20180105183334/@comment-32330664-20180105225543

Apparently at one point Newton wrote in his journal the speculation that maybe we see things by a light beam coming out one eye, bouncing off the thing we see, and into the other eye. Of course he quickly rejected the idea, but still, if it was good enough for him to consider... Bkharvey (talk) 22:55, January 5, 2018 (UTC)