Unit 6- Eye Stuff

Question 1

eyebrow

Answer 1

serves to divert sweat and water from the eye

Question 2

eyelashes

Answer 2

catch foreign objects (particles, bacteria, etc) to keep them from entering the eye

Question 3

cones

Answer 3

process light waves

allow us to see color, detail, and in bright conditions

middle of retina

Question 4

rods

Answer 4

process light waves

allow us to see in dark conditions

sides of retina (peripheral vision)

Question 5

lens fibers

Answer 5

fibers that make up a majority of the lens

ensure that it maintains a transparent appearance

Question 6

cornea

Answer 6

protective outer layer of eye which protects the front and helps to focus light waves as they enter

Question 7

sclera

Answer 7

the white outer covering of the eye

provides protection and helps maintain shape of the eye

Question 8

choroid

Answer 8

middle layer of eye wall that provides oxygen and nutrients to the eye through blood vessels

Question 9

optic disc/blind spot

Answer 9

the optic disc is the portion of the eye where all of the axons meet from the neurons and the optic nerve begins

no photorecptors in this portion of the eye makes it a blind spot

Question 10

ciliary body

Answer 10

structure that holds the ciliary muscles and produces the aqueous humor that fills the space between the cornea and lens

Question 11

suspensory ligaments

Answer 11

attach to the lens and ciliary body

hold the lens in place

Question 12

ciliary muscles

Answer 12

muscles in the ciliary body that contract to control the shape of the retina to focus on objects at varying distances

Question 13

lens

Answer 13

structure behind the pupil that focuses light waves to ensure a clear and focused image and projects them onto the retina for processing

Question 14

iris

Answer 14

colored muscle around the pupil that changes its size to control the amount of light coming into the eye

Question 15

pupil

Answer 15

opening in the iris that allows light to enter the eye

Question 16

retina

Answer 16

innermost layer of the eyewall, at very back of eye

contains the photoreceptors that process light waves and turn them into neural impulses our brain can understand

Question 17

macula lutea/fovea centralis

Answer 17

point in the eye of most clear image/most focused image due to the high concentration of cones

Question 18

optic nerve

Answer 18

carries the neural messages from cones and rods to the occipital lobes of the brain

Question 19

vitreous humor

Answer 19

fluid in between the lens and the retina that is thick and unmoving

traps stuff in the eye that is not supposed to be there so it can’t float around and do damage

Question 20

aqueous humor

Answer 20

fluid in between the cornea and lens

constantly replenished

supplies nutrients to entire eye and keeps the cornea inflated

Question 21

canal of schlemm

Answer 21

drains the old aqueous humor out of the eye so it can be replaced with fresh fluid