PSYC310 Lecture Notes - Lecture 7: Photopic Vision, Spectral Sensitivity, Absorption Spectroscopy
3 Mar 2017
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Document Summary
Image formation for extended objects: follows same principles as refraction as point source, inverted image is produced on retina. The blood vessels cast shadows on the retina: why don"t we see them, rods and cones. The basic machinery for seeing exit because the perceptual system is constantly filling in missing information: answer: they are stabilized retinal images, and you can see them with a simple trick. We don"t see a hole in our visual world where the blood vessels and nerve fibers. Rods filled with a photosensitive substance called rhodopsin. Seeing in dark and light environments: several mechanisms contribute to seeing in widely varying illumination. Photopigment regeneration (low light, more photons absorbed; high light, fewer photons absorbed) illumination) Duplex retina: two types of photoreceptors with two sensitivities. Neural circuitry (e. g. local coding for contrast instead of absolute (cid:498)early vision(cid:499) early stages of enconding the visual scene: retinal codes all information that leaves the retina does so via the.
