Psychology › Section E · Sensation and perception › Topic E.3

Vision

Sight feels effortless, but it is a long chain of work: optics that focus light, receptors that transduce it, and brain pathways that rebuild colour, shape, motion and depth. This topic follows that chain from the cornea to the cortex.

In this topic

  • The eye as an optical instrument
  • Rods and cones
  • From the retina to the cortex
  • Feature detectors and parallel pathways
  • Worked example: walking into a dark cinema
  • Colour vision: the trichromatic theory
  • Colour vision: the opponent-process theory
  • Worked example: a negative afterimage
  • Colour vision deficiency
  • Depth perception
  • Common mistakes to avoid
  • Key takeaways

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