Illustrations from: Basic Vision: An Introduction to Visual Perception, by Robert Snowden, Peter Thompson & Tom Troscianko, Oxford University Press (2006)

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The Physical World
The Physical World Our senses can only give us a rough idea of specific aspects of the visual world
		
Short-sighted
Short-sighted
		
Dyslexia
Dyslexia A dyslexic man comes to a Toga party dressed as a goat
		
Lazy Cartoonist
Lazy Cartoonist The human brain can turn two dots with a line below them into a human face with expressions
		
Missing the Big Things
Missing the Big Things
		
The Grandmother Cell
The Grandmother Cell A hypothetical neuron that is associated directly with a complex and specific concept or object
		
One-Ton Brain
One-Ton Brain Selective pressures can only drive our brains to a certain size before other factors in the balance outweigh the advantages
		
Size After Effect
Size After Effect
		
Retinal vs Real Size
Retinal vs Real Size 'Those people look like ants from up here': An ant close up can be the same size on your retina as a person far away
		
Percy Pond Creature
Percy Pond Creature The selective advantages of the evolution of new photoreceptors in tetrapods - the ability to distinguish objects by reflected spectrum in addition to illumination
		
Raging Bull in Blue-Yellow
Raging Bull in Blue-Yellow Bulls are colour-blind and can only see in blue-yellow channels, so can't distinguish the matador's red cloth (muleta) from other red or green objects
		
Helmholtz vs Sherrington
Helmholtz vs Sherrington

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