3.1 Vision and the Eye Part 2 Flashcards
What are the two photoreceptors in the eye?
rods
cones
What are rods?
cells that are stimulated in dim light
Which photoreceptor is more sensitive to light?
rod
Which photoreceptors operate in bright light?
cones
Which photoreceptors help generate sharp color images?
cones
Where is the lens located?
posterior to the iris and pupil
Where is the vitreous body located?
interior portion of the eye posterior to the lens
What is the vitreous body filled with?
vitreous fluid
What is the function of the vitreous body?
hold the retina firmly to the choroid
What is the general pathway of light in the eye?
cornea - aqueous humor - lens - vitreous humor - retina
Where do the photoreceptors send their signal?
optic nerve to the optic chiasm
Where is the optic chiasm located?
base of the hypothalamus
When do the optic tracts form?
after the optic chiasm
Where do the optic tracts terminate?
lateral geniculate nucleus in the thalamus
Where does the visual information travel after the LGN in the thalamus?
optic radiations to the primary visual area of the occipital lobe
What are all of the visual fields of the eyes?
nasal
peripheral
binocular
left
right
Where is the nasal visual field?
closest to the nose
Where is the peripheral visual field?
lateral side of each eye
What is the binocular visual field?
3-D vision created from overlapping information from the nasal visual fields
Where is sensory information gathered from the left side of the body interpreted?
right side of the brain
