4.5-4.12: Vision 101 Flashcards
The distance between between any two consecutive crests or troughs of a wave
Wavelength
The number of cycles per second of a wave
Frequency
The height of the crests of a wave
Amplitude
A hole in the iris where light enters the eye
Pupil
The colored muscle circling the pupil, which increases or decreases the size of the pupil to adjust how light enters the eye (Gives the eye its color)
Iris
A membrane at the front of the eye that focuses the incoming light on the retina
Lens
Adjustment of the lens’s thickness by specialized muscles in order to change the degree to which it bends light
Accommodation
A surface on the back of the eye that contains the photoreceptor cells
Retina
Photoreceptor cells that primarily supports nighttime vision
Rods
Photoreceptor cells that are responsible for high-resolution color vision
Cones
A bundle of axons that converge from the retina and transmit action potentials to the brain
Optic nerve
An area in the middle of the visual field where there are no photoreceptors and no information can be received
Blind spot
A small pit in the center of the retina that is densely packed with cones
Fovea
A theory of color perception stating that three types of cone cells, each most sensitive to a specific wavelength of light, work together to produce our perception of a multicolored world
Trichromatic theory
A theory of color perception stating that information from the cones is separated into three sets of opposing or opponent channels in the ganglion cell layer
Opponent-process theory
