Nervous System (O2) Flashcards
function of eyelid
covers + protects eye
function of conjunctiva
covers white of eyes
function of retina
contains photoreceptor cells- extension of brain
function of fovea
responsible for the sharpest vision
function of optic disc
nerve fibers leave the eye- creates blind spot
function of optic nerve
exits at optic disk + transmits info from eye to occipital lobe
function of cornea
transparent dome that focuses light
function of sclera
communication of cornea- the white of eyes
function of aqueous humor
liquid surrounding lens
function of lens
focusing
function of vitreous humor
supports internal parts
function of choroid
contains blood vessels
what is the pathway light takes from the eye to the brain
cornea – aqueous humor – pupil – iris controls amount of light – lens – reflects through vitreous humor – onto the retina
what do you see with rods
black + white
what do you see with cones
colors- red, green, blue
if you see a red car, what color is being reflected
red
what is myopia
nearsighted
what is hyperopia
farsighted
what is astigmatism
part of your field of view is out of view
what eye structure is involved with glaucoma and what happens?
pressure from VITREOUS HUMOR damages OPTIC NERVE
what eye structure is involved with leber congenital amaurosis (LCA) and what happens?
variants in the RPE65 protein expressed in PHOTORECEPTOR CELLS
what eye structure is involved with cataracts and what happens?
clouding of the LENS
what eye structure is involved with aniridia and what happens?
person is born without IRIS
what eye structure is involved with retinal detatchment and what happens?
RETINA pulls away from supportive tissue
what eye structure is involved with conjunctivitis and what happens?
(pink eye) discharge in the CONJUNCTIVA, redness, itchiness
central nervous system
brain and spinal cord
peripheral nervous system
cranial and spinal nerves