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ReneWhilst you don't see literal "stars" (ie big yellow stars, Tom and Jerry style) you can get a "twinkling effect". I usually get this a couple of times a game on the Rugby pitch!
Seeing stars is usually due to a lack of blood reaching the brain, and thus a lack of oxygen. Most commonly this happens after standing up quickly or straightening after bending over. You don't see it all the time because the arteries serving the brain reflexively dilate to maintain pressure, but those reflexes may be disturbed by lack of sleep or food, a hangover, or an infection. Physical trauma may also cause the reflex to malfunction, which is why stars float around Sylvester the Cat's head when he gets bonked. Rarely, seeing stars can be caused by too much blood reaching the brain.
The stars you see are actually neurons in your visual cortex misfiring, a hallucination at the lowest possible level. When the neurons' oxygenation changes drastically, their membrane potential also changes. Ordinarily this wouldn't matter, because all of the surrounding neurons' potentials would change at the same time. When it happens due to standing quickly or taking a few G's of acceleration, the change happens so fast that the neurons closest to capillaries change well before the surrounding neurons. This causes them to fire spontaneously which your brain interprets as vision; you see stars.
I have heard this a lot, and always wondered myself, I can remember as a kid pressing on my eyes to rub them and seeing stars.
The retina of your eye will respond to either light or pressure, the pressure causes the cells to fire same as light would giving you the impression that sparks are going off inside your eyelids.
For an example close your eye and place your fingertip on your closed eyelid, now move your finger around gently, you will see an aura of light around our finger.
This is not actual light, but the forced firing of the photo reactive cells in the retina making your brain think light is being seen, it is the way your brain is meant to interpret signals from the eye.
Also when you cough or sneeze you can cause enough pressure to fire these cells as well.
Another cause for seeing stars is like in the Cartoons when you see a circle of stars going around the characters head. This is a real thing, when you hit your head hard enough a shock wave transmits across your head to the eye and a pressure firing of the retina cells happens, combine that with the dizziness you often feel with a bad hit on the head and yo can imagine why cartoonists portray it that way.
This is caused by neurons in your visual cortex misfiring.
It happens do to a lack of blood to the head and thus a lack of oxygen. This can happen when you stand up too quickly, suffer head trauma, strenuous exercise or sometimes with migraine headaches.
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What is the maximum degree a human eye can go up too?
If you mean how far. If you can see the stars in the Milky Way - that is about how far we can see.
Why do you feel dizzy and can't see when you get up too fast?
This can be caused by high blood pressure.
Why aren't there any stars on the moon?
The stars are visible from the moon and are in fact clearer than when view from Earth. You do not see the stars in pictures taken on the moon because the exposure is set too low for the camera to pick them up.
Do constellations ever fade?
No - they are made up of stars. As long as the stars are there, the constellations will be there too.
Will you throw up if you eat too little?
No, usually people throw up if they eat too much or too fast.
Is maranda cosgrove growing up too fast?
no
Why can you see more stars some nights and fewer on other nights?
I think it is because some stars are covered by dark clouds too far up for us to see and light pollution stops you from seeing all of them because in northumberland in the hill's and valley's at night there was loads of stars because there was no lights hope this answer was helpful to you :))
How does ponyboy see his brother Darry?
Pony see's Darry as someone who is "hard and firm and rarely grins at all," and he believes Darryl has grown up "too fast." Ponyboy prefers Sodapop :)
What are the release dates for Dr- Phil - 2002 Growing Up Too Fast?
Dr- Phil - 2002 Growing Up Too Fast was released on: USA: 10 April 2009
What are the release dates for Father Albert - 2011 Growing Up Too Fast?
Father Albert - 2011 Growing Up Too Fast was released on: USA: 28 July 2011
Does the sky have stars?
stars are referred to as being in the sky, If you refer to the sky as everything that you see when you look up..then yes
Why do we see star at night?
we only see stars in the sky at night because in the day it is light because of the sun. The stars are very light but the stars can not be seen because of the sunlight. So when it is pitch black you can see the stars so the stars sparkle in the sky without no light showing so its just the stars and the moon lighting up the world!
