Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Visible light induced ocular delayed bioluminescence as a possible
  origin of negative afterimage   The delayed luminescence of biological tissues is an ultraweak reemission of
absorbed photons after exposure to external monochromatic or white light
illumination. Recently, Wang, B\'okkon, Dai and Antal (Brain Res. 2011)
presented the first experimental proof of the existence of spontaneous
ultraweak biophoton emission and visible light induced delayed ultraweak photon
emission from in vitro freshly isolated rat's whole eye, lens, vitreous humor
and retina. Here, we suggest that the photobiophysical source of negative
afterimage can also occur within the eye by delayed bioluminescent photons. In
other words, when we stare at a colored (or white) image for few seconds,
external photons can induce excited electronic states within different parts of
the eye that is followed by a delayed reemission of absorbed photons for
several seconds. Finally, these reemitted photons can be absorbed by
nonbleached photoreceptors that produce a negative afterimage. Although this
suggests the photobiophysical source of negative afterimages is related retinal
mechanisms, cortical neurons have also essential contribution in the
interpretation and modulation of negative afterimages.

9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
18
The categories of this paper are: econ