|
My understanding was that averted vision worked because you have a 'blind' spot in the retina where the optic nerve is which doesn't matter in normal circumstances but when looking at a very dim object represents a loss of resolving power due to the reduced active area. Thus by using slightly averted vision you get more of the light that is entering your eye from that object falling onto the rod cells.
Incidentally, if I recall correctly your rod cells are primarily seeing green, but your brain interprets it as monochromatic and bases it's colour perception solely on the the input from the various cone cells. So the red light isn't activating the rod cells unless it is fairly bright.
|