PSYCH 1XX3 Lecture Notes - Lecture 5: Visual Perception, Parietal Lobe, Nanometre
19 Apr 2020
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Unit 2: the stimulus - light: eyes process light to visualize the world. Light travels as waves; and vary 2 respects: amplitude: height of each wave; indication of perceived brightness, variation in amplitude affect the perception of brightness, the greater the amplitude, more light is being reflected/emitted by object. Unit 3: the eye: pathway: cornea pupil lens vitreous humor retina. Iris (colored part of eye): controls size of pupil. Lens: transparent structure that does final focusing of light onto retina at back of eye. Interestingly, the curvature of the lens causes images to land on retina upside-down and reversed from left to right: however, the final perceived image is product of brain activity. Thus rather than seeing the world upside-down/reversed, there"s a correction that allows you to see the properly oriented image. Lens is flexible tissue; its shape can be altered by surrounding muscles, allowing it to focus on objects that are close or far away.
