L4 Histology Eye

Question 1

What is the path of light through the eye?

Answer 1

Cornea –> Lens –> retina –> optic n. –> brain

Question 2

What is the function of the eye?

Answer 2

regulate entering light and converting it into neural impulses

Question 3

What are the layers of the eye?

Answer 3

outer
middle
inner

Question 4

What is in the fibrous outer layer of the eye?

Answer 4

cornea
sclera

Question 5

What is the vascular & pigmented layer of the eye?

Answer 5

Iris
ciliary body
choroid

Question 6

What is in the inner/retinal layer of the eye?

Answer 6

Retinal pigment epithelium
Neural retina
Fovea (macula)
Optic disk

Question 7

Where is light converted into a neural response?

Answer 7

The retina

Question 8

What is another word for fovea

Answer 8

macula

Question 9

What produces aqueous humor?

Answer 9

ciliary body

Question 10

What are the aqueous chamber of the eye?

Answer 10

Anterior and posterior

Question 11

What chamber is gelatinous humor found in?

Answer 11

vitreous chamber

Question 12

What keeps aqueous humor separated from the vitreous humor?

Answer 12

density difference b/n the two

Question 13

Where is the anterior chamber located?

Answer 13

anterior to the iris + lens

Question 14

Where is the post. chamber located?

Answer 14

post. to the iris

Question 15

What are the 5 layers of the cornea? sup to deep

Answer 15

Cornea epithelium
Bowman’s Mem.
Stroma
Descemet’s mem.
Cornea endo.

“Eat Bagels + Sweet Doughnuts Everyday”

Question 16

What is the fxn of the cornea?

Answer 16

focus 75% of light onto retina

Question 17

Which middle eye structure is vascularized and pigmented?

Answer 17

Choroid

Question 18

Which middle eye structure changes the thickness of the lens?

Answer 18

ciliary body

Question 19

Which middle eye structure is SM and pigmented?

Answer 19

Iris

Question 20

What is the effect of dilator pupillae contraction in the iris?

Answer 20

pupil enlarges and allow more light

Question 21

What is the effect of constrictor pupillae contraction in the iris?

Answer 21

pupil shrinks allowing less light

Question 22

Where are zonular fibers located?

Answer 22

b/n the ciliary bodies and the lens

Question 23

What is the fxn of the lens?

Answer 23

responsible for 25% of light focusing into retina

Question 24

What are the layers of the lens?

Answer 24

Outer layer (capsule)
Subcapsular layer
inner layer

Question 25

What are cataracts? How are they treated?

Answer 25

Opacities in the lense and can be treated w lens transplant

Question 26

What divided post and anterior chambers?

Answer 26

iris

Question 27

What are the 10 layers of the retina? from inner to outer

Answer 27

Inner limiting membrane Ganglion cell axons Ganglion cell bodies Inner synaptic layer Inner nuclear layer Outer synaptic layer Outer nuclear layer Outer limiting membrane Rods+cones Retinal pigment epithelium

Question 28

What is the role of retinal pigment epithelium?

Answer 28

absorb exs light and phagocytize discs from rods and cones

Question 29

What would be the manifestation of macular degeneration?

Answer 29

loss of center view, while peripheral view is still intact

Question 30

What is the outer surface of the eyelid made out of?

Answer 30

thin skin w stratified squamous epithelium

Question 31

What is the inner surface of the eyelid made out of?

Answer 31

stratified columnar epithelium + goblet cells

Question 32

Which glands are located at the eyelashes?

Answer 32

zeis glands

Question 33

What type of glands are meibomium glands?

Answer 33

sebaceous

Question 34

What type of glands are moll glands?

Answer 34

apocrine sweat glands

Question 35

What structures are located on the inside of the eyelid?

Answer 35

conjunctiva meibomium glands moll gland zeis gland