That’s interesting, and probably true — the ability to *perceive* something, involves much more than the ability to *sense* it. I doubt that the retinas of the ancients’ eyes were any different than those of modern man — but, how they filtered and processed visual information could have been quite different.
Have made a note to give you a post in the morning.
Hint: Julian Jaynes' The Origin of Consciousness and the Breakdown of the Bicameral Mind.
Google it if you get some free time! Read the reviews on Amazon!
It's a paradigm changer!