PSYC 271 Lecture Notes - Lecture 7: Retinal Ganglion Cell, Vitreous Body, Binocular Disparity
25 Nov 2017
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Document Summary
Human vision turns an upside down 2d retinal image into the 3d world we perceive: what we see is not the same thing as what we are really looking at. We see a mental representation constructed by our brains based on the information it receives from our eyes. Ciliary muscles modify the shape of the lens. Retina entire back covered in receptors. Fovea most concentrated area of receptor cells. Optic nerve ganglion cell axons go through retina and pass info. V bottom-most layer: the optic disc (the blind spot) where the axons of the retinal ganglion cells penetrate the retina and exit the eye no receptors here. Spectral sensitivity the perceived brightness associated with different wavelengths of light: cones 425-700nm most sensitive to ~550nm, rods 400-650nm most sensitive to ~500nm. Eye movement the human eye makes about 3 fixations per second, intersected by saccades (rapid movements between fixations)
