The immersing of light through the vitreous humor supporting the retina, before it is carried off by the optic nerve into the brain, could further the prosecution of those accused of having tunnel vision as also suffering from delusions, irrespective of whether the illusion was shared by others of a similar vein or not.
Just because one may be accused of having tunnel vision or of not seeing the light enough to be aware that the tunnel isn't real, doesn't mean that, according to the brain, the tunnel doesn't exist. It could be that without the tunnel, the light may not be able to be filtered or shifted into stories inside the mind.
Light impulses into the thinking and memory camps of the mind through 'tunnels' called optic nerves, and while those nerves may seem to stimulate the user of the light with illusionary visions, I'd say they probably also provide, the life force in question, the only truth available to them. In this way, any delusionary tunnel might be the simple act of thinking that you can see the perspective of another because of your ability to communicate personal judgement. A judgement from an optical illusion that I think might, in fact, turn out as having tunnel vision.
The organic connection, all living things have to their own seeing, may well be about the creation of a tunnel vision that life has to cultivate in order to survive its' reality on earth. It may also be that emotional distress, arising from human changes, appears in the mind as a darkened tunnel. Distressed thoughts can light up the human mind with so many images from negatives, that the story arising could be one of tunnel vision. To my way of thinking, when an individual is distressed, for whatever reason, the light in the tunnel is the illusion because of the over focusing of the mind on the bright electrical impulses brought about by dark negatives. The brain lives in the dark and the only light it interprets is that of electrical impulses whether those impulses come from optical or other sensory nerves.
The human ability to manipulate it's own cognitive imagery with traditional and creative memories and thoughts, may very well be why people talk about seeing tunnels and light. Yet, whether the tunnel or the light is the illusion or both or neither, I think what we can all be assured of are our shadows.
© Chris Tyne 05/02/2016