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Aftereffect
Aftereffect A long lasting change in perceived brightness that occurs after prolonged viewing of a given luminance that remains after the luminance has been changed. Presumably due to adaptation in the exposed region.
RELATED TERMS--------------------------------------
Adaptation
A change in the sensitivity to light of a photoreceptor or the visual system as a whole to match the average light intensity present.
SIMILAR TERMS--------------------------------------
Afterbirth
A common term for the placenta after it has been delivered.
Afterimage
A long lasting change in perceived brightness that occurs after prolonged viewing of a given luminance that remains after the luminance has been changed. Presumably due to adaptation in the exposed region.
PREVIOUS AND NEXT TERMS--------------------------------------
Action potential
A photoreceptor's relative spectral sensitivity.
Action spectra
A photoreceptor's relative spectral sensitivity.
Adaptation
A change in the sensitivity to light of a photoreceptor or the visual system as a whole to match the average light intensity present.
Afferent
Heading towards. A system's afferent signals are those entering the system from elsewhere. (As opposed to Efferent)
Affordance
A possibility for action afforded to a perceiver by an object. The affordances of an object depend upon the perceiver as well as upon the characteristics of the object. For example, a stream affords such actions as jumping and paddling to a person, but to an frog it affords swimming.
Aftereffect
Afterimage
A long lasting change in perceived brightness that occurs after prolonged viewing of a given luminance that remains after the luminance has been changed. Presumably due to adaptation in the exposed region.
Aggregate field
The area within which the receptive fields of cells in a single hypercolumn of the visual cortex fall.
Aliasing
Results when density of sampling is less than density of signal. One can only measure the portion of the input falling over the sampled positions. Sampled values for two different signals can be the same when the in-between values are different.
Allelotropia
A depth percept can cause a shift in perceived form, namely change in the perceived distance between patterns in a configuration. For example that a pattern AB C is viewed in one eye and the pattern A BC is viewed through the other, the letter B is seen in depth at a position halfway between A and C.
Amacrine cell
A type of neuron seen in the retina.
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