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Anatomy > Ocular Anatomy > Flashcards

Ocular Anatomy Flashcards

0
Q

Lines the inner aspect of eyelids

A

Palpebral conjunctiva

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1
Q

Tansparent vascular tissue that extends from limbus to the musculocutaneous jxn of eyelid

A

Conjuctiva

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2
Q

Covers the sclera

A

Bulbar conjunctiva

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3
Q

Blood supply of conjunctiva

A

Anterior ciliary body

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4
Q

Nerve supply of conjunctiva

A

Opthalmic division of CN V

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5
Q

Covers sclera underneath the conjunctiva. Provides nourishment for the sclera

A

Episclera

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6
Q

Outer coat of the eye, normally white and opaque

A

Sclera

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7
Q

Sclera is continuous with _____ anteriorly

A

Cornea

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8
Q

Sclera is continuous with the ________ of the _________ posteriorly

A

Dural sheathe.

Optic nerve.

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9
Q

Transparent front window of the eye. Refracts light

A

Cornea

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10
Q

6 layers of cornea

A

Corneal epithelium - ssnke. Regenerative ability
Bowmans layer - collagen fibers
Corneal stroma - collagen type 1
Duas layer - discovered in 2013, thin strong layer
Descements membrane - acellular, colagen type 4
Endothelium - cornes deturgences

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11
Q

Jxn bet cornea and sclera

A

Limbus

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12
Q

Limbus is the jxn bet what 2 structures?

A

Cornea and sclera

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13
Q

Limbus may develop whitening as part of old age

A

Arcus senilis

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14
Q

Space between cornea and iris

A

Anterior chamber

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15
Q

Eyes drainage system

A

Trabecular meshwork

Canal of schlemm

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16
Q

Uveal tract is composed of

A

Iris
Ciliary body
Choroid

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17
Q

Vascular layer of the eye

A

Uveal tract

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18
Q

Colored part of eye

A

Iris

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19
Q

Iris is composed of

A

Blood vessels bv
Connective tissue ct
Melanocytes mela
Pigment cells pig

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20
Q

Blood supply of iris

A

Major circle of iris

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21
Q

Innervation of iris

A

Ciliary nerve

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22
Q

If sphincter muscle contracts pupil

A

Constricts

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23
Q

If dilator muscle contracts pupil

A

Dilates

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24
Q

Parasympathetic causes pupils to…

A

Constrict vis CN 3

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25
Q

Sypathetic causes pupils to….

A

Dilate

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26
Q

Ciliary body produces

A

Aqueous humor

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27
Q

Vascular pigmented layer between sclera externally and retina internally

A

Choroid

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28
Q

Refracts and focuses light on the retina

A

Lens

29
Q

Dimensions of lens
Anteroposterior?
Equatorial diameter?

A

Anteroposterior 4-5mm

Equatorial diameter 9-10mmw

30
Q

Narrow space behind iris and in front of zonule fibers

A

Posterior chamber

31
Q

Space behind lens

A

Vitreous cavity

32
Q

Blood supplies of retina

A

Central retinal artery -1/3 inner

Choroid artery - 2/3 outer

33
Q

Responsible for fine central vision

A

Macula

34
Q

Depression in the center of macula

A

Fovea

35
Q

Direct extension of CNS

A

Optic nerves

36
Q

How long is the optic nerve

A

50mm

37
Q

4 optic nerve segments

A

Intra ocular - 1mm
Intra orbital - 25mm
Intra canalicular - 9mm
Intra cranial - 10mm

38
Q

Optic chiasm is suspended above the?

A

Sella turcica

39
Q

X shaped structure

A

Optic chiasm

40
Q

Lateral fibers of optic tracts are from?

Medial fibers of optic tracts are from?

A

Lateral - ipsilateral optic nerve

Medial - contralateral optic nerve

41
Q

Sensory relay nucleus. Located in the thalamus

A

Lateral geniculate body

42
Q

Carry visual info from LGB to the visual cortex

A

Optic radiation

43
Q

Inferior fibers that pass through the temporal lobe looping around the inferior horn of the lateral ventricle

A

Meyers loop

44
Q

Brodmanns area 17. Responsible for image processing

A

Primary visual cortex

45
Q

Bony cavity that contains the eye

A

Orbit

46
Q

Volume of orbit

A

30cc

47
Q

Roof of orbit composed of

A

FS
Frontal
Sphenoid lesser wing

48
Q

Medial orbital wall composed of

A 
MELS
Maxillary
Ethmoid
Lacrimal
Sphenoid lesser wing
49
Q

Lateral walls of orbit composed of

A

ZS
Zygomatic
Sphenoid greater wing

50
Q

Floor of orbit composed of

A

ZMP
Zygomatic
Maxillary
Palatine

51
Q

Site of annulus of zinn

A

Orbital apex

52
Q

Lateral of superior orbital fissure

Medial of superior orbital fissure

A

Lateral lacrimal, CN4,CN5

Medial CN3, CN5, CN6, superior opthalmic vein

53
Q

What passes through optic canal

A

Optic nerve

Opthalmic artery

54
Q

Inferior orbital fissure

A

CN 5

Inferior opthalmic vein

55
Q

Blood supply of orbit

A

Opthalmic artery from itracranial branch of ICA

56
Q

Branches of opthalmic artery

A

Central retinal artery
Lacrimal artery

Medial palpebral arteries
Posterior ciliary arteries- long(ant) and short(post)

57
Q

External ocular structures

A

Eyelids

Lacrimal apparatus

58
Q

Lubricates eye surface

A

Meibomian glands within tarsus

59
Q

Upper lid covers about_____ of the superior limbus

A

2mm

60
Q

Exposed zone bet upper and lower eyelids

A

Interpalpebral fissure 27mm long 8-11mm wide

61
Q

Upper eyelid can be raised

A

15mm

62
Q

Eyelid fold due to

A

Levator aponeurosis

63
Q

Punctum

A

Lid margin

64
Q

What arises fromt he anterior portion of the eyelid

A

Eyelashes

65
Q

What arises from the posterior portion of the eyelid

A

Meibomian glands

66
Q

Orbicularis oculi is divided into

A

Orbital

Palpebral

67
Q

Extension of periosteum of the roof and floor of the orbit

A

Orbital septum

68
Q

Levator muscle divides to form??

A

Levaror aponeurosis

Muellers muscle-elevates eyelids CN3

69
Q

Has meibomian glands

A

Tarsus

70
Q

Accessory eyelid structures

A

Plica semilunaris-rich in goblet cells

Caruncle-sebaceous gland

Anatomy (1 decks)

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