Visual System Flashcards
Order of visual processing…
Cornea, Iris, Pupil, Lense, Retina, Optic Disk, Optic Nerve, Thalamus, Occipital Lobe(primary visual cortex), Dorsal(paradial lobe), Ventral stream(wernecki’s area).
Cornea(1)
the eyes protective layer and the first area of the eye that bends light
Iris(2)
the colored part of the eye which is a muscle that controls the pupil
Pupil(3)
the black portion in the center of the eye, aids in regulating the amount of light that reaches the inner eye, the amount of light present determines the size of the pupil.
Lense(4)
focuses the light on the retna and aids in seeing far away
Retina(5)
The neural tissue inside the back of the eye; it absorbs light, processes images, sends visual info to the brain, and contains photo receptors.
Optic Disk(6)
Where the nerves reach the eye, and your blind spot
Optic nerve(7)
Sends info to both of the brains hemispheres (crosses)
Thalamus(8)
Sends and receives information regarding visual stimulus.
Occipital lobe(9)
Information travels to the primary visual cortex located in the occipital lobe
Dorsal(upper brain)(10)
Contains the paradial lobe which aids in determining our position in space
Ventral stream(11)
The wernecki’s area which helps us identify objects due to the fact that we think in language
Accomodation
The flattening and bending of the lense
Nearsightedness
Light falls too short of retna
Farsightedness
Light pushes too far past the retna
Optic chasm
Where the optic nerves switch sides
Cones
Daytime vision and color
Rods
Nighttime and peripheral vision
Trichromatic Theory
The human eye has three receptors that are sensitive to different wave lengths; Red, Green, and Blue combine to make all other colors
Opponent Processing Theory
White + Black, Blue + Yellow, and Red + Green; when you see one of the colors the other color is blocked.
After Image
A flash of the opposite color
Feature Detectors(Hubel+Weisel)
The experimented on cats visual cortex and determined we have specific cells for different things(feature detectors)
