*CAUTION. Anterior Cavity is further divided into two sections called CHAMBERS
What are the two types of liquid found in eyeball? Where is each located?
Distant vision= lens is flattened
Close vision= lens bluges
How does the lens accommodates for distant vision? How does lens accommodates for close vision?
accommodation is the eye adjusts to near vision. the lens will curve/bulge more
what is accommodation? and what happens to the lens?
rods and cones
retinal layers consists of?
Low light vision
Rod=low light vision, dim vision
They are active in the dark, light turns them off, signals on optic nerve
Rods are used for what type of vision?
color and acuity
Cone= color and acuity
Needs light, outnubmered by rods (18 rods to 1 cone)
Cones are used for what type of vision?
is the retina uniform?
(AKA the optic nerve head) is the location where ganglion cell axons exit the eye to form the optic nerve. There are no light sensitive rods or cones to respond to a light stimulus at this point. This causes a break in the visual field called "the blind spot"
what is the optic disc?
It is an oval-shaped highly pigmented yellow spot near the center of the retina. Has MORE CONEs than rods.
Near its center is the fovea- it contains the largest concentration of cone cells in the eye and is responsible for central, high resolution vision. NO RODS IN FOVEA
What is the macula of the eye? What is in it's center?
eyes--optic nerve--optic chiasma--optic tracs (both sides)--superior colliculus--part of thalamus (lateral geniculate body of thalamus) --occipital lobe
OPTIC NERVE, II
(all other eye nerves are motor)
name the nerve that sense/play a part with vision
tympanic membrane! It vibrates, it gives us the sounds.
what is another name of the ear drum? What is it primarily responsible for?