[Vivisectus]

10 ways to know sight is not efferent:

1: The moons of Jupiter
2: We hit things where we do not see them when we launch probes at distant objects such as mars or saturn.
3: Cameras and eyes show the same image when taking pictures of objects that are very far away, yet cameras only record light.
4: Starlight and seen stars show up in the same place, even though stars move and are so far away it takes years for the light to arrive
5: Mirrors only reflect light, and yet we see images
6: the common TV only reflects light, and yet images show up
7: simple tests to measure the speed of light using moving blades and the human eye work amazingly accurately.
8: Perspective. There is no reason for distant objects to appear smaller unless sight is the detection of travelling light.
9: The sunset. There is no reason for the sun to appear to change color, unless we detect light.
10: There is no known mechanic by which efferent sight could be imagined to work.