bipolar cells
part of the retina receiving input directly from receptors
fovea
area in the center retina specialized for acute detailed vision
ganglion cells
type of neuron in retina relieving input from bipolar cells, binding together=blind spot
midget ganglion cells
receptor in the fovea attaches to single bipolar cell and single ganglion cell known as midget ganglion cell
photopigments
chemicals releasing energy when struck by light, activating second messenger
opponent process theory
we perceive colour in terms of paired opposites, bipolar cells are excited by one set of wavelenghts, inhibited by another
retinex theory
when information from various parts of retina reaches cortex, cortex compares each information to determine color perception in each area
trichromatic theory
we perceive colour through relative rates of responses by three kinds of cones, with each kind maximally sensitive to a different seet of wavelength
