Naked Science Forum

General Science => General Science => Topic started by: stana on 05/07/2007 16:19:07

Title: eYeS
Post by: stana on 05/07/2007 16:19:07

Hey, i was wondering, Howcome if we stare at the sun, and we look away..we still see the sun in our eyes? Then when we try to look at it..it moves?

Thanks


Ohyea, and please dont go staring at the sun to try it out, I dont wanna be responsible for anyone going blind. Maybe use a bright flash light

Title: eYeS
Post by: another_someone on 06/07/2007 02:23:28

Aside from possible effects within the brain, my understanding is that the main cause is over stimulation of the optic sensors in the eye, which cause them to take some time to reset themselves (you can often see the same thing with television cameras, where if they have a bright light in the filed of vision, and then the light moves across the field of vision, it will leave a glowing trail behind it, as the sensors have too much energy to quickly dissipate and so remain switched on for some time even as the source of energy (the light) has moved away.

Title: eYeS
Post by: tony6789 on 08/07/2007 17:21:24

good post A.S

Title: eYeS
Post by: stana on 15/07/2007 17:43:54

ALSO,

Why if we apply pressure to the eye do we see double?I just stuck my finger underneath my eye, and seen TWO computer screens, and how come when we apply pressure on our eyes we see patterns and stuff..well atleast i do