Anatomy & Function of the Eye

Question 1

function of Lacrimal gland?

Answer 1

secretion of tears, removed dust/particles

Question 2

5 layers of eye?

Answer 2

1. conjunctiva
2. sclera
3. cornea
4. choroid
5. retina

Question 3

function of sclera?

Answer 3

outer protection

Question 4

function of conjunctiva?

Answer 4

protection & lubricates eye (mucous, tears)

Question 5

function of choroid?

Answer 5

vascular layer, provides nutrients/oxygen

Question 6

function of retina?

Answer 6

contains photoreceptors

Question 7

function of cornea?

Answer 7

allows light to enter eye

Question 8

where is aqueous humor secreted in eye?

Answer 8

in posterior chamber

Question 9

how does aqueous humor move in eye?

Answer 9

from posterior chamber to anterior chamber

Question 10

how is excess aqueous humor removed?

Answer 10

reabsorbed by scleral venous sinus

Question 11

shape of lens used for distant vision?

Answer 11

flat shape

Question 12

shape of lens used for near vision?

Answer 12

rounded shape

Question 13

function of fovea?

Answer 13

provides sharpness of visual detail

Question 14

where is fovea located in eye?

Answer 14

retina

Question 15

function of rods?

Answer 15

allows for night vision

Question 16

function of cones?

Answer 16

allows greater resolution, colour vision in bright light

Question 17

2 structures that focus light on retina?

Answer 17

cornea, lens

Question 18

what is hyperopia?

Answer 18

short eyeball, focus behind eye

Question 19

what is myopia?

Answer 19

long eyeball, focus in front of retina

Question 20

describe how vision is processed

Answer 20

1. input from eye travels from retina -> thalamus
2. half the input from each eye goes to opposite side of brain
3. input travels from thalamus to occipital cortex

Question 21

sensitivity of cones?

Answer 21

not very sensitive

Question 22

sensitivity of rods?

Answer 22

extremely sensitive

Question 23

where do tears drain from?

Answer 23

nasolacrimal duct into nasal cavity