Histology Of The Eye

Question 1

What are the 3 tunics of the eye?

Answer 1

1 fibrous tunic
2 vascular tunic
3 inner tunic

Question 2

What are the components of the fibrous tunic?

Answer 2

Sclera and cornea

Question 3

What are the components of the vascular tunic?

Answer 3

Choroid, ciliary body, and iris

Question 4

What is/are the component(s) of the inner tunic?

Answer 4

Retina

Question 5

What are the sclera layers? (3)

Answer 5

1 episcleral layer
2 Sclera proper
3 lamina cribrosa

Question 6

T/F: the episcleral layer is innervated

Answer 6

False; highly vascular

Question 7

Sclera proper is the attachment site for…

Answer 7

Tendons of extrinsic eye muscles

Question 8

T/F: Anteriorly the sclera is continuous with the cornea

Answer 8

T

Question 9

T/F: The junction between the two is limbus; it is highly innervated

Answer 9

F; highly vascularized

Question 10

T/F: Posteriorly the sclera is continuous with the dural covering of the optic nerve

Answer 10

T

Question 11

What are the cornea layers? (5)

Answer 11

1 corneal epithelium 
2 Bowman’s membrane 
3 corneal storms
4 descemet’s membrane
5 corneal endothelium

Question 12

The choroid contains loose or tight CT?

Answer 12

Loose

Question 13

What is the acellular fused basal laminate of choriocapillaris and pigmented retinal epithelium

Answer 13

Bruch’s (glassy) membrane

Question 14

Ciliary body is covered by a double or single layer of cells?

Answer 14

Double

Question 15

What is the layer of cells that produce the aqueous humor

Answer 15

Nonpigmented surface layer

Question 16

The iris has a double or single layer of epithelium?

Answer 16

Double

Question 17

The retina has 2 subdivisions that are divided by the?

Answer 17

Ora serrated

Question 18

What causes glaucoma?

Answer 18

Increased pressure due to compromised drainage of aqueous humor from anterior chamber

Question 19

What are the chambers of the eye?

Answer 19

Anterior, posterior, and vitreal chamber

Question 20

Bipolar cells conducting neurons that synapse with?

Answer 20

Rods and cones

Question 21

Horizontal cells inter neurons that interconnect rods and cones with each other and with?

Answer 21

Bipolar cells

Question 22

Amacrine cells interneurons that connect __ cells and bipolar neurons

Answer 22

Ganglion cells

Question 23

Muller cells are __ cells that extend throughout retina

Answer 23

Neurological cells

Question 24

Ganglion cells are conducting neurons whose axons form the fibers of the __?

Answer 24

Optic nerve

Question 25

Fovea has the highest __?

Answer 25

Visual acuity

Question 26

Macula lutea is the yellow region surrounding the?

Answer 26

Fovea

Question 27

Fovea centralis has the highest density of __ cells

Answer 27

Cone

Question 28

Optic disc lacks

Answer 28

Photoreceptors

Question 29

Optic disc aka as __ of retina

Answer 29

Blind spot

Question 30

Fovea centralis lacks __ cells and __

Answer 30

Rod cells and capillaries

Question 31

Rod aka

Answer 31

Spherule

Question 32

Cone aka

Answer 32

Pedicle

Question 33

Inner segment contains

Answer 33

Mitochondria and other organelles

Question 34

Cell body contains

Answer 34

Nucleus and short axon

Question 35

Rods use __ as photopigment

Answer 35

Rhodopsin

Question 36

Rod are sensitive to __ light intensity and responsible for what type of vision?

Answer 36

Low light and black and white vision

Question 37

Cones use how man different kinds of iodopsins

Answer 37

3

Question 38

Cones are sensitive to __ intensity light and responsible for what type of vision?

Answer 38

High intensity and color vision

Question 39

How many rods synapse it’s single bipolar cell

Answer 39

Up to 100 rods

Question 40

How man cone cells synapse with a single bipolar cell

Answer 40

1 cone cell

Question 41

The ganglion cell layer contain what type of cells?

Answer 41

Cell bodies of ganglion cells

Question 42

Optic nerve layer contain what type of cells?

Answer 42

Axons of ganglion cells

Question 43

Pigmented epithelial cells synthesize what?

Answer 43

Melanin

Question 44

What type of protein is rhodopsin?

Answer 44

Transmembrane glycoprotein

Question 45

What is bleaching?

Answer 45

Disassembly of rhodopsin into opsin and retinal after light stimulation

Question 46

What are the 3 parts to a lens?

Answer 46

Capsule, anterior epithelium, and lens nucleus

Question 47

What are the 2 glands associated with the eyelid?

Answer 47

Glands of Zeiss (sebaceous gland) | Glands of MOll (sweat glands)

Question 48

What fascia is the fibrous core of eyelids? And what gland is found here?

Answer 48

Palpebral fascia and meibomian glands (sebaceous)

Question 49

What lines the inner surface of eyelids, covers eyeball, and has stratified columnar/squamous epithelium with goblet cells?

Answer 49

Paperbral conjunctiva