[zeroca]

I’ll consult indicated site and give you an answer, but briefly I can say that we must differ from each-other
1. Trace impression within field of vision in case of closed eyes;
2. Inversion of trace impression within field of vision in the same case.
I’ll revise my previous posts slightly changing them:

Originally Posted by zeroca

When watching the switched-on bulb, open the eyes and close them quickly again several times, concentrating on switched-on bulb, or switch it on/off several times in turn (better in the dark room); finally concentrate on the visual perception within field of your vision with closed eyes (concentrate on the perception, left as a trace) allowing some period of time to pass after eyes' closing.
The first, you can notice after final closing of eyes, is that the trace of bulb, i.e. impression of it is lighter, then background, which is darker. After a while (keeping eyes closed) impression of bulb becomes darker to compare with background of impression, i.e.
Trace impression becomes inverted!
I wonder, with which particular part of our visual system we perceive mentioned inversion? As eyes are closed (or rather the bulb as light source, i.e. as stimulant, is turned off), retina isn’t irritated by external stimulant!
So trace impression (even if it’s the result of direct changing of condition of cells of retina) is perceived by either occipital parts of brain, or “higher” cortical systems.

I repeat that final visual analysis – final visual perception happens in higher cortical zones;

Originally Posted by zeroca

Until considering visual cortical zones and perceptive cortical visual functions, I’d like to mention, that in my opinion, any image, fallen on and then perceived by visual system (from retina up to occipital cortical stages!), i.e. not including higher cortical zones of temporal, frontal or other fields! is result of influence of discrete light (eliminated or reflected from outer object), i.e. light influences on visual system in discrete form.
After switching the light in the dark room all objects appear immediately, but they disappear at once with switching off the light, i.e. if permanent influence of light on visual system is stopped, then perception by vision also is stopped, i.e. for permanent visual perception of outer world every-instant influence of light on the retina is needed, but to the question: influence – discreet or indiscreet? I’d definitely answer, that discreet.

inversion of trace impression, as I mentioned, happens in higher visual cortical systems, i.e.
If trace impression “belongs” to visual path: retina-occipital centers, then inversion of trace impression belongs to visual path: occipital cortex-higher visual cortex!