Caution: Lo Res
A 5 min. 30 sec. video I helped to produce for a friend of mine (BioMed Engineer) for a class he's taking. It's all about the process by which images are processed by the eye and sent via the optic nerve to the visual cortex in the brain.
The light rays reflected from the object observed first hit the cornea, then the lens and are refracted so that it hits the retina (at the back of the eye) upside down.
The photoreceptors in the retina are then excited, sending a signal from one cell to another and another, translating it back and forth until finally, it's send down the optic nerve to the visual cortex in the brain. The brain receives the signal at the other end and interprets it into a living, moving image.
It's all quite wonderful and mysterious and utterly complex. Scientists still don't fully understand many of the processes by which the eyes help us to see.
This video is a little different than my usual stuff, but I've narrated it, so it's awesome. Plus it's highly educational, so all you science dorks, check this puppy out!
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