retina in the back of the eye.
retina uh okay sorry for that tangent um okay so back to the question so so right we love ourselves how far reaching is
retina that's part of perception that is perception the other main transformation
Retinal anatomy has sort of a strange naming convention.
Not retina , but your cornea and your lens might be scratched.
Yeah-- retina .
my retina ; that causes certain electrical excitations in my retina ; that in turn causes certain electrical excitations in my optic nerve; that causes various chemical and electrical
the retina Works how the ca Works uh we understand how the signals travel up and
A retinal implant, yeah.
This is the inner retina where you have the first part of visual processing.
We can reprogram a retina of a mouse, an old mouse, and make it see just like a young mouse again.
Even your retina itself is an outcrop of the brain.
And the retinal implant is, like you might guess, implanted on the retina .
impinges on your retina your brain doesn't automatically detect he image and make an image for you but you have something called attention that has to be directed in order
to your retina .
on your retina because all these things are happening for you automatically.
and your retina has cells that span the receptors under the low light and the high light and the cells--retinal ganglion cells-- that span those two say, "Ooh.
stimulates the retina and the brain okay um now I think I can actually show
neural activation in the retina and the levant weakly a nucleus in the visual cortex that explains why something looks as if it's on your visual left rather
the glass enters my retina that causes certain electrical excitations in my retina that in turn causes certain electrical excitations in my optic nerve
something lingers on your retina .
The light hitting your retinas , the sound of my voice in your ears, the ambient temperature of the room-- your brain is processing all that information.
through detached retinas .
What about old retinas ?
because his retinas don't function.
Since corresponding retinal points are seeing these two different things, they must be in the same place in space." And, you see the hole in the middle of your hand.
seconds worth of visual retinal titillation. He's not one of those guys." There are many of those guys. Mostly guys. "When he puts a Martin on the page it means something."
have in both our retinas we have about 200 million photo receptors so each one of our eyes is 100 megapixel
And we see here the retina .
in between each frame onto the human retina , and the brain figures out how to make it move.
Here is a blood vessel in the retina .
Instead of landing on Galileo's retina , they land on these superconducting sensors that were built up at JPL.
The signals are sent from the retina to something in the middle of your brain, the lateral geniculate nucleus.
And then it stimulates the retina , the remaining cells on the retina , with that visual information.
It's not useful to have a retina implant if you're blind because you don't have eyes, right?
But the signal that arrives on our retina is a two-dimensional image, scrambled often.
The other reason is that in your retina , every cone cell in the fovea sends a fiber out to the optic nerve that goes
On the central part of the retina called the fovea.
It's the center of the retina for both eyes.
The central part of this retina .
male#8: So remind me the retina moves with the eye right?
that the light is producing in your retina and in your brain has not been
have even gotten to the inner retina let alone to the phalamus or to the visual cortexes which is six or seven synapses away.
And it's these photosensitive retinal ganglion cells that allow us to align the internal data to the external world.
And the way it works with a retinal implant is that you have a digital camera, and that feeds into an electrode grid that plugs
So it's useful to have a retinal implant.
He said those are pictures of the retinas of patients with a disease called retinitis pigmentosa, or RP.
There's a brand new retinal prosthesis that's being experimented with that does something very funky, actually.
of projected straight on to our retinas which is a much less clumsy and clunky way of tapping into the collective knowledge of mankind than using my thumbs or even talking to my phone.
This is a low-power shot of the retina , of these cells.