On the structure of the retina: layers, bipolar, horizontal, and amacrine cells; retinal ganglion cells and their types, center-surround and lateral inhibition, on and off ganglion cells (including another surprise left by evolution), contrast sensitivity, motion sensitivity and directional sensitivity, and just a tiny nod in the direction of philosophy of math.
Errata: Andromeda galaxy is not as luminant as Venus; Venus is 1000 times brighter :\ I read Wikipedia wrong, and it pretty much invalidates the point. I'll have edit this sequence out from the next version of this lecture.
Links:
* On Hubel & Wiesel (Nobel laureates):
Something like a tiny documentary about them (6 min): https://www.youtube.com/watch?v=4nwpU7GFYe8
* Experiment that looks like an ON cell from the retina (recorded from the thalamus, but it's still very similar; 1minute): https://www.youtube.com/watch?v=jIevCFZixIg - try to understand what's going on
