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PSYCH101 Lecture : October 5th Lecture Notes highly deatailed notes about the eye and its functions.

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School
University of Waterloo
Department
Psychology
Course
PSYCH101
Professor
Colin Mac Leod

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PSYCH101 Full Course Notes
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PSYCH101 Full Course Notes
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Document Summary

> rods: retinal receptors that detect shading of black, white & grey. > cones: retinal receptors that detect colours; concentrated in the fovea (cent re). Saccade: movement of the eye ((cid:0)jump(cid:0)); takes about second (250ms); blind. Fixation: stabilized eye once stopped; lasts about second; processing visually. >see light from 380-760 nanometers (violet to red) > trichromat theory : types of cones detect 3 different wavelengths. (normal co lour vision) >opponent process theory; 2 types of ganglion cells encode colour. Protanopia: lack of photo pigments for red cones; green instead; read appears to be darker (less intense) Deuteranopia: lack of photo pigments for green cones; red instead; gree n darker. Tritanopia; 1 in 10,000 (not sex linked); loss of blue cones; see in re ds and greens. Thought they could set up a set of laws on how we see the laws: gestalt grouping (cid:0)its not what you saw its what you think about what you see(cid:0)

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Related Questions

Critics of the trichromatic theory of colour vision have indicated that this theory has a major limitation. Which of the following statements MOST accurately reflects this limitation? A) Young and von Helmholtz were incorrect in assuming that cone photoreceptors in our retina are maximally responsive to a specific wavelength of light B) The trichromatic theory cannot explain the phenomenon of visual after-effects C) Rod photoreceptors in our retina, not cones, are responsible for the neural coding of colour D) Research has determined that there are actually six types of cones in the retina, rather than three as proposed by Young and Helmholtz E) Trichromatic theory cannot explain sensory adaptation

33. The theory of color vision that proposes that the human eye has three types of receptors sensitive to different wavelengths is: a. the tridetector theory. c. the trichromatic theory b. the opponent process theory. d. the tripartite theory.

1. Zachary was born with a rare visual defect. He has no cone photoreceptors in his retina, there are only rods. Assuming that all other aspects of his visual system are normal, which of the following would characterize Zachary's vision? A) poor visual acuity B) an inability to differentiate between black and white C) a difficulty seeing in low light conditions D) colour blindness E) both A) and D)