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Ocu-Anaphy (Prelim) > Fibrous Layers > Flashcards

Fibrous Layers Flashcards

Perfect score in prelims cutieee

1
Q

Shaape of the eyeball?

A

Oblate spheroid

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2
Q

Center of curvature of the cornea

A

Anterior Pole

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3
Q

Center of posterior curvature of the eyeball

A

Posterior Pole

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4
Q

A line that connects the two poles

A

optic axis

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5
Q

Connects the fovea centralis to the nodal point

A

visual axis

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6
Q

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

A

position of the eyeball

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7
Q

volume of the eyeball

A

6-7mL

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8
Q

what are the fibrous layers

A

sclera, cornea

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9
Q

what are the middle vascular layers

A

choroid, iris, ciliary body

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10
Q

what is the inner nervous layer

A

retina

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11
Q

a space occupying mass within the cone

A

displacement of the eyeball

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12
Q

transparent 1/6 of the eyeball

A

cornea

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13
Q

composed mainly 90% of stroma

A

cornea

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14
Q

covered with arranged stratified squamous epithelium

A

cornea

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15
Q

what are the layers of the cornea

A

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

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16
Q

major site of metabolic activity, capable of regeneration

A

Anterior epithelium

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17
Q

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

A

Squamous epithelium

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18
Q

midzone layer, ⅔ of the polyhedral cells
Contains tenofilaments

A

wing cells

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19
Q

anchoring filaments

A

hemidesmosomes

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20
Q

arranged cells go from base to apex

A

desmosomes

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21
Q

deepest layer
Tall and columnar often show mitosis

A

basal cell

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22
Q

not real basement membrane
Interwoven collagen fibers

A

bowman’s membrane

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23
Q

Modified stroma
Resistance to trauma, microorganisms, foreign bodies

A

bowman’s membrane

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24
Q

90% of the cornea
Arranged parallel

A

corneal stroma

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25
Q

wandering cells

A

keratocytes

26
Q

real basement membrane
Line of schwalbe

A

descemet’s membrane

27
Q

undergoes corneal deturgescence
Polygonal in shape

A

endothelium

28
Q

pumping mechanism

A

endothelium

29
Q

Nourishment of the cornea

A

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

30
Q

atmospheric oxygen for aerobic metabolism

A

central cornea

31
Q

nourished by the superficial and deep corneal plexuses

A

peripheral cornea

32
Q

derives nutrients from aqueous

A

corneal endothelium

33
Q

what are the three corneal epithelium

A

squamous cell, wing cell, basal cell

34
Q

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

A

true

35
Q

nerve supply of the cornea

A

long and short ciliary nerves

36
Q

Volume of the eyeball

A

6-7 mL

37
Q

Limbus to equator

A

16 mm

38
Q

Limbus to posterior

A

32 mm

39
Q

Roc at anterior of the cornea

A

7.7 mm

40
Q

Circumference of the eyeball

A

69-81 mm

40
Q

Roc at posterior of cornea

A

6.9 mm

41
Q

Thickness of cornea at center

A

0.5-0.6 mm

42
Q

Thickness of cornea at periphery

A

0.7 mm

43
Q

Refractive index at air

A

1.00 mm

44
Q

Refractive index at aqueous

A

1.33 mm

45
Q

fibrous ⅚ of the globe, opaque

A

sclera

46
Q

contains trabecular meshwork

A

corneoscleral junction (limbus)

47
Q

drainage system of anterior chamber

A

trabecular meshwork

48
Q

bridged by the cornea, rich in elastic tissue

A

anterior scleral foramina

49
Q

sieve-like structure

A

posterior scleral foramina

50
Q

perforates the sclera to posterior

A

optic nerve

51
Q

site of perforation

A

posterior scleral foramina

52
Q

triangular ridge

A

scleral spur

53
Q

contains melanocytes, brown colored

A

lamina fusca

54
Q

weak, rise in intraocular pressure

A

lamina cribosa

55
Q

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

A

scleral stroma

56
Q

contains loose-fibro elastic tissue

A

episcleral tissue

57
Q

circular canal

A

schlemm’s canal

58
Q

blood supply of the sclera

A

anterior ciliary artery

59
Q

nerve supply of the sclera

A

long ciliary nerves, trigeminal nerve

Ocu-Anaphy (Prelim) (2 decks)

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