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Light, eye and the brain (Light (Wave (Electromagnetic radiation,…
Light, eye and the brain
Light
Intensity
Luminance scale
candelas/m2
Particle
Photons
Ray
Wave
Electromagnetic radiation
nanometres
Brain
Optic chiasm
LGN
6 layers
2 Magnocellular
4 Parvocellular
Primary Visual Cortex
Simple Cells
Edge/bar detectors
Phase Sensitive
Orientation Tuned
Complex Cells
Phase insensitive
Size don't matter
Hypercomplex Cells
End-stopped
Orientation & Length
Eye
Focussing
Cornea
2/3 focusing power
Lense
1/3 focusing power
Myopia
Hyperopia
Presbyopia
loss of lense flexibility
Transduction
Photo-receptors
Rods
Cones
3 Lengths
Ganglion Cells
Magnocellular
#
Where
Large
Parvocellular
#
Small
What
Optic nerve
Optic Chiasm
LGN
V1
Receptive field
Centre-surround
Contrast
Edges
Fovea
Smokes cones