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PSYC 100 Chapter Notes -Afterimage, Rhodopsin, Saccade

Course Code
PSYC 100
Ingrid Johnsrude

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The Eye and It’s Functions 6/8/2012 6:47:00 AM
wavelength- the distance between adjacent waves of radiant energy, in vision, most
closely associated with the perceptual dimension of hue
cornea- transparent tissue covering the front of the eye
sclera the tough outer layer of the eye (white)
iris the pigmented muscle of the eye that controls the size of the pupil
lens the transparent organ situated behind the iris of the eye, helps focus the image
on the retina
accommodation changes in thickness of the lens of the eye that focus images of near
and distant objects in the retina
photoreceptors specialized neurons that transduce light into neural activity

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optic disc a circular structure located at the exit point from the retina of the axons of
the ganglion cells that form the optic nerve
cells of the retina
bipolar cell layer
o receives information from photoreceptors and passes it on to the
ganglion cells, then axons proceed through the optic nerves to the
ganglion cell layer
o receives information from photoreceptors by means of bipolar cells and
then axons proceed through optic nerves to the brain
rod photoreceptor that is sensitive to light
cone photoreceptor that is responsible for daytime vision and colour perception
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