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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
Parasympathetic causes pupils to...
Constrict vis CN 3
25
Sypathetic causes pupils to....
Dilate
26
Ciliary body produces
Aqueous humor
27
Vascular pigmented layer between sclera externally and retina internally
Choroid
28
Refracts and focuses light on the retina
Lens
29
Dimensions of lens Anteroposterior? Equatorial diameter?
Anteroposterior 4-5mm | Equatorial diameter 9-10mmw
30
Narrow space behind iris and in front of zonule fibers
Posterior chamber
31
Space behind lens
Vitreous cavity
32
Blood supplies of retina
Central retinal artery -1/3 inner | Choroid artery - 2/3 outer
33
Responsible for fine central vision
Macula
34
Depression in the center of macula
Fovea
35
Direct extension of CNS
Optic nerves
36
How long is the optic nerve
50mm
37
4 optic nerve segments
Intra ocular - 1mm Intra orbital - 25mm Intra canalicular - 9mm Intra cranial - 10mm
38
Optic chiasm is suspended above the?
Sella turcica
39
X shaped structure
Optic chiasm
40
Lateral fibers of optic tracts are from? | Medial fibers of optic tracts are from?
Lateral - ipsilateral optic nerve | Medial - contralateral optic nerve
41
Sensory relay nucleus. Located in the thalamus
Lateral geniculate body
42
Carry visual info from LGB to the visual cortex
Optic radiation
43
Inferior fibers that pass through the temporal lobe looping around the inferior horn of the lateral ventricle
Meyers loop
44
Brodmanns area 17. Responsible for image processing
Primary visual cortex
45
Bony cavity that contains the eye
Orbit
46
Volume of orbit
30cc
47
Roof of orbit composed of
FS Frontal Sphenoid lesser wing
48
Medial orbital wall composed of
``` MELS Maxillary Ethmoid Lacrimal Sphenoid lesser wing ```
49
Lateral walls of orbit composed of
ZS Zygomatic Sphenoid greater wing
50
Floor of orbit composed of
ZMP Zygomatic Maxillary Palatine
51
Site of annulus of zinn
Orbital apex
52
Lateral of superior orbital fissure | Medial of superior orbital fissure
Lateral lacrimal, CN4,CN5 | Medial CN3, CN5, CN6, superior opthalmic vein
53
What passes through optic canal
Optic nerve | Opthalmic artery
54
Inferior orbital fissure
CN 5 | Inferior opthalmic vein
55
Blood supply of orbit
Opthalmic artery from itracranial branch of ICA
56
Branches of opthalmic artery
Central retinal artery Lacrimal artery Medial palpebral arteries Posterior ciliary arteries- long(ant) and short(post)
57
External ocular structures
Eyelids | Lacrimal apparatus
58
Lubricates eye surface
Meibomian glands within tarsus
59
Upper lid covers about_____ of the superior limbus
2mm
60
Exposed zone bet upper and lower eyelids
Interpalpebral fissure 27mm long 8-11mm wide
61
Upper eyelid can be raised
15mm
62
Eyelid fold due to
Levator aponeurosis
63
Punctum
Lid margin
64
What arises fromt he anterior portion of the eyelid
Eyelashes
65
What arises from the posterior portion of the eyelid
Meibomian glands
66
Orbicularis oculi is divided into
Orbital | Palpebral
67
Extension of periosteum of the roof and floor of the orbit
Orbital septum
68
Levator muscle divides to form??
Levaror aponeurosis | Muellers muscle-elevates eyelids CN3
69
Has meibomian glands
Tarsus
70
Accessory eyelid structures
Plica semilunaris-rich in goblet cells | Caruncle-sebaceous gland

Anatomy (1 decks)

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