Fibrous Layers

Question 1

Shaape of the eyeball?

Answer 1

Oblate spheroid

Question 2

Center of curvature of the cornea

Answer 2

Anterior Pole

Question 3

Center of posterior curvature of the eyeball

Answer 3

Posterior Pole

Question 4

A line that connects the two poles

Answer 4

optic axis

Question 5

Connects the fovea centralis to the nodal point

Answer 5

visual axis

Question 6

anterior part of the orbital cavity, closer to the roof, and closer to the lateral than medial wall

Answer 6

position of the eyeball

Question 7

volume of the eyeball

Answer 7

6-7mL

Question 8

what are the fibrous layers

Answer 8

sclera, cornea

Question 9

what are the middle vascular layers

Answer 9

choroid, iris, ciliary body

Question 10

what is the inner nervous layer

Answer 10

retina

Question 11

a space occupying mass within the cone

Answer 11

displacement of the eyeball

Question 12

transparent 1/6 of the eyeball

Answer 12

cornea

Question 13

composed mainly 90% of stroma

Answer 13

cornea

Question 14

covered with arranged stratified squamous epithelium

Answer 14

cornea

Question 15

what are the layers of the cornea

Answer 15

Anterior epithelium, bowmans membrane, corneal stroma, descemet’s membrane, endothelium

Question 16

major site of metabolic activity, capable of regeneration

Answer 16

Anterior epithelium

Question 17

flat and has horizontal nuclei, Adheres to the corneal tear film

Answer 17

Squamous epithelium

Question 18

midzone layer, ⅔ of the polyhedral cells
Contains tenofilaments

Answer 18

wing cells

Question 19

anchoring filaments

Answer 19

hemidesmosomes

Question 20

arranged cells go from base to apex

Answer 20

desmosomes

Question 21

deepest layer
Tall and columnar often show mitosis

Answer 21

basal cell

Question 22

not real basement membrane
Interwoven collagen fibers

Answer 22

bowman’s membrane

Question 23

Modified stroma
Resistance to trauma, microorganisms, foreign bodies

Answer 23

bowman’s membrane

Question 24

90% of the cornea
Arranged parallel

Answer 24

corneal stroma

Question 25

wandering cells

Answer 25

keratocytes

Question 26

real basement membrane Line of schwalbe

Answer 26

descemet's membrane

Question 27

undergoes corneal deturgescence Polygonal in shape

Answer 27

endothelium

Question 28

pumping mechanism

Answer 28

endothelium

Question 29

Nourishment of the cornea

Answer 29

Perilimbal vessels Direct oxygen from air Indirect oxygen from tears Aqueous-fluid substance

Question 30

atmospheric oxygen for aerobic metabolism

Answer 30

central cornea

Question 31

nourished by the superficial and deep corneal plexuses

Answer 31

peripheral cornea

Question 32

derives nutrients from aqueous

Answer 32

corneal endothelium

Question 33

what are the three corneal epithelium

Answer 33

squamous cell, wing cell, basal cell

Question 34

Is cornea avascular and devoid of lymphatic drainage, true or false?

Answer 34

true

Question 35

nerve supply of the cornea

Answer 35

long and short ciliary nerves

Question 36

Volume of the eyeball

Answer 36

6-7 mL

Question 37

Limbus to equator

Answer 37

16 mm

Question 38

Limbus to posterior

Answer 38

32 mm

Question 39

Roc at anterior of the cornea

Answer 39

7.7 mm

Question 40

Circumference of the eyeball

Answer 40

69-81 mm

Question 40

Roc at posterior of cornea

Answer 40

6.9 mm

Question 41

Thickness of cornea at center

Answer 41

0.5-0.6 mm

Question 42

Thickness of cornea at periphery

Answer 42

0.7 mm

Question 43

Refractive index at air

Answer 43

1.00 mm

Question 44

Refractive index at aqueous

Answer 44

1.33 mm

Question 45

fibrous ⅚ of the globe, opaque

Answer 45

sclera

Question 46

contains trabecular meshwork

Answer 46

corneoscleral junction (limbus)

Question 47

drainage system of anterior chamber

Answer 47

trabecular meshwork

Question 48

bridged by the cornea, rich in elastic tissue

Answer 48

anterior scleral foramina

Question 49

sieve-like structure

Answer 49

posterior scleral foramina

Question 50

perforates the sclera to posterior

Answer 50

optic nerve

Question 51

site of perforation

Answer 51

posterior scleral foramina

Question 52

triangular ridge

Answer 52

scleral spur

Question 53

contains melanocytes, brown colored

Answer 53

lamina fusca

Question 54

weak, rise in intraocular pressure

Answer 54

lamina cribosa

Question 55

contains collagen fibers that varies in size, shapes, diameter, loop, arches

Answer 55

scleral stroma

Question 56

contains loose-fibro elastic tissue

Answer 56

episcleral tissue

Question 57

circular canal

Answer 57

schlemm's canal

Question 58

blood supply of the sclera

Answer 58

anterior ciliary artery

Question 59

nerve supply of the sclera

Answer 59

long ciliary nerves, trigeminal nerve