![]() ![]() It's in fact deactivated by light rather than activated by light. But its born from the trauma and severe mental stress of combat. ![]() It is a deep stare or gaze that is not focused on any particular thing. It's worth noting actually that the retina is less active when light shines on it than in the dark. Paul Dooley Aug25 Comments I have heard veterans say that they can pick out other veterans of armed conflict because of their thousand yard stare. So then when you look at a normal level of light, like a wall, you get these kind of black spots where you've been looking at light where the cells have been over stimulated.Ĭhris - So, you have lost the photo pigment in that particular area temporarily because it's been broken down by the photons of light hitting it, and when it regenerates, it comes back then you see normal again, but while it's regenerating up the pigment because of the overexposure, you see a less intense spot, so you therefore see a dark spot. Normally you get light as particles called photons coming into your eye these stimulate the cells by changing this light sensitive pigment, which is called retinal, into a slightly different form and they stimulate the cells to send electrical impulses to your brain.īut, if you get a really bright light - like a flash or if you look at the sun for a long time or even just a really bright light bulb - this sends the cells into overdrive and they get really overexcited, and it takes them a little while to calm down. ![]() It's populated with cells called rods and cones, and these are full of light sensitive pigments. It's because of something called photo-bleaching and it happens to the cells in your retina which is the light sensitive bit at the back of your eye. ![]()
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