Brain = clever

[Tom]

Blind Spot and "Filling-in" phenomenon

Close your left eye, look at the cross, and move your head toward the monitor. Watch as the dot vanishes.

I find that amazing.

 

[TdC]

it's where your optic nerve connects to your retina, no? I keep forgetting

 

[cHodAX]

Thats actually pretty cool.

 

[TdC]

there is the old marine trick of always looking about 15deg to the side of a light source. meaning looking directly at a faint source will make you not see it.

 

[Raven]

looking at a feint anything straight on in the dark will mean you can't see it because the centre of the back of your eye needs more light to stimulate it. Vitamin A will reduce the size of the blind spot, found in carrots.

 

[Wij]

Wasn't all the shit about carrots British wartime propaganda to deflect attention from the fact we had radar ?

 

[Rulke]

The eye has all sorts of evolutionary dead ends and flaws in it, ironic really that people claim the eye is evidence of a designer

 

[Nate]

I like how this is cool and not one of those bloody AHHHH things

 

[Ctuchik]

thats funky. i can see the spot all the way to the monitor if i close the right eye, but with the left eye closed it vanishes almost instantly

 

[Nate]

thats funky. i can see the spot all the way to the monitor if i close the right eye, but with the left eye closed it vanishes almost instantly

That's probably because you have both eyes closed

 

[tris-]

there is the old marine trick of always looking about 15deg to the side of a light source. meaning looking directly at a faint source will make you not see it.

Ive always found that happens to me. I must be hardcore to fuck.

 

[dysfunction]

thats funky. i can see the spot all the way to the monitor if i close the right eye, but with the left eye closed it vanishes almost instantly

Me too..but my right eye is a bit "lazy"...

 

[Scouse]

there is the old marine trick of always looking about 15deg to the side of a light source. meaning looking directly at a faint source will make you not see it.

Different trick tho Teeds. It's all about rod and cone cells in your eye.

Cone cells see colour and they are situated around the back of the eye.
Rod cells see black & white and are situated more to the edges. (We're talking inside of a sphere here...)

Rod cells are more sensitive to low levels of light than cone cells, so if you're looking at a *really* dim light source you may not pick it up with your cone cells, but if you look slightly away from it your rod cells will pick it up.


Yep. A-Level biology a mere 18 years after I did the course

 

[dysfunction]

Yep. A-Level biology a mere 18 years after I did the course

What you after a gold star?

 

[Ctuchik]

That's probably because you have both eyes closed

 

[Ctuchik]

What you after a gold star?

he can have the ones i stole from the teacher...

 

[Wazzerphuk]

So it's just me that the dot doesn't disappear for then?

 

[Scouse]

So it's just me that the dot doesn't disappear for then?

Always knew you weren't human

 

[Wazzerphuk]

It genuinely doesn't. But then I do have remarkably good eyesight.