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