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Psych

Terms

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Cornea
allows light to pass through, protects eye, focuses light on back of the eye, transparent outer bulge
Iris
colored muscle in the center of which is the pupil, controls size of the pupil
Lens
flexible structure that can bulge out and flatten, focus light on retina
Accommodation
the process by which the ciliary muscles change the thickness of the lens of the eye to permit variable focusing on near and different objects
Retina
the layer at the back of the eye that contains photoreceptors and converts light energy to neutral responses
Photoreceptors
receptor cells in the retina that are sensitive to light
Fovea
area of the retina that contains densely packed cones and forms the point of sharpest vision
Rod
responsible for dim light (white/black), perception and peripheral movement, located on outside of fovea
Cones
responsible for color and visual acuity, fine detail, located in fovea, max visual acuity
Dark Adaptation
chemical process, rhodopsin absorbs light and magnifies it so we can see in the dark
Optic Nerve
the axons of the ganglion cells that carry information from the eye towards the brain
Blind Spot
where the nerve leaves the eye, no receptor cells are present in this region
Hue
the dimension of color space that captures the qualitative experience of the color of light, psychological concept of wavelength
Saturation
the dimension of color and space that captures the purity and vividness of color sensation, psychological concept of intensity and wavelength gradient
Brightness
the dimension of color space that captures the intensity of light, psychological concept of amplitude
Rhodopsin
a biological pigment of the retina that forms photoreceptor cells and the first events in the perception of light

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