PSYCH 1XX3 Lecture Notes - Visual Acuity, Double Star, Cortical Blindness

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Perception interprets nerve impulses: you don"t really think about it, it just happens, unconscious inference about the world. Two rows of circles: spheres or indents, your brain assumes that there is a single light source, brain assumes that light comes from above. Even if your head is upside down, your brain continues to assume that the sun is coming from above, and therefore: brain assumes that like objects are grouped together. Visual acuity vs. hyperacuity: hyperacuity is not physically limited by photoreceptors, the best example of the distinction between acuity and hyperacuity comes from vision. The first stage is the optical imaging of the outside world on the retina. Light impinges on the mosaic of receptor sense cells, rods and cones, which covers the retinal surface without gaps or overlap, just like the detecting pixels in the film plane of digital cameras.

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