2006-08-14 17:31:29 · 4 answers · asked by Patrick V 1 in Science & Mathematics ➔ Biology
Everything that you perceive through eyesight is an electrochemical stimulation of the optic nerve. Usually this is done by receiving light into the eye. When the eye is closed, you can perceive the refresh that takes place as the cells on the retina go back into balance chemically. Since some wave lengths are brighter to the eye than others, the different cells (rods and cones) clear the energy at different rates. That is perceived as light - either speckles or clouds - and gradually fades away as chemical balance is restored.
Other simulations of the optic nerve occur via various pressures on the eye or nerve itself, such a a blow to the head or pressure from a blood vessel.
;-D Take care of your eyes. Never stare at a bright light such as the Sun or a welding torch.
2006-08-14 17:47:18 · answer #1 · answered by China Jon 6 · 0⤊ 0⤋
Im not sure if this is the answer but ...
the cells that are recieving the light are still firing their signal for a short duration of time after you close them.
2006-08-15 01:21:36 · answer #2 · answered by leikevy 5 · 0⤊ 0⤋
They are dead cells in your retina and have been there since you were born. Everyone (I believe) has them.
Note that when you close your eyes, they always seem to "float" down (gravity), and when you move your eyes sharply, they will "float" that direction, as well (inertia).
2006-08-15 00:45:03 · answer #3 · answered by Raj L 3 · 0⤊ 0⤋
you mean flyers... it is the things that you see as something moving in the dark when you close your eyes... this is due to retinal detachment that happens with almost everyone... when the retina detach from its location and moves back it causes these thing to appear...
2006-08-15 02:06:08 · answer #4 · answered by Anonymous · 0⤊ 0⤋