Quote:
we have two eyes that allow us to perceive depth and this
means that each eye must receive 8 photons.


I don’t know where your information about the 8 photons came from, and it’s not something I’ve found myself; so I don’t know if it’s 8, or 4 per eye. Whichever it is, if the number arriving per eye is above the threshold we see, if not, we dont.

Quote:
if 8 photons are required for a human eye to SEE a light flash
then how many photons are required if the human has both eyes open?


This gave me the impression you were suggesting the number of photons reaching one eye would diminish if a second eye were opened. That was what I thought you could not be serious about.

There never was nothing.