Hello Robert,

What does aura have to do with the afterimage? How are they related?

An afterimage is an optical illusion caused when the eye's photoreceptors adapt from the overstimulation and lose sensitivity. This not an aura. As to my understanding, the aura is the object's (animate or inanimate) subtle energy field.
Why I have to gaze at objects or at someone's brow center to learn to see the aura? All I see this way is afterimages...
I'm curious why 99% of the "How to see the aura" guides on the internet instruct people to gaze at the objects to the point when one sees the afterimage and say that this is the object's aura.
The peripheral vision is more 'movement' sensitive but this refers to physical movements which aura is definitely not. Even if you think of an aura as a vibration this is not the samе as physical vibration - a physical object(s) vibrating at specific frequency. So the physical eyes actually see physical objects which means that I cannot train them to see the aura. Even, I'm a bit skeptic whether that gazing at objects actually develops the peripheral vision. Not sure this is healthy for the eyes too.

Thanks!
Atanas