Green wrote:No, it can't detect motion. But what it can do, is lead your nervous system to confabulate motion where there is none. The sudden disappearance of an object (tracked by moving one's head) into the secondary blind spot, causes the optic tectum to confabulate movement, in much the same way that the primary blind spot causes the optic tectum to confabulate a background that you aren't really seeing. It samples the information around the blind spot, and tries to match that in the data it makes up.
I will repeat you are contradicting the article you quoted. Here again is what you seem to be ignoring:
Only motion can be detected well, therefore you may have to learn to move your eyes to detect something that doesn't move.
Objects that aren't moving appear to move (autokinesis). This has probably led to a number of plane crashes.