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Head and Neck > 05.1 Anatomy of the Orbit, Orbital Region and the Eyeball > Flashcards

05.1 Anatomy of the Orbit, Orbital Region and the Eyeball Flashcards

1
Q

What is the roof of the orbit?

A

Frontal bone

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2
Q

What is the lateral wall of the orbit?

A

Zygomatic bone

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3
Q

What is the medial wall of the orbit?

A

Ethmoid and lacrimal

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4
Q

What is the inferior wall of the orbit?

A

Maxillary bone

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5
Q

What are the three openings of the orbit posteriorly?

A

Superior orbital fissure
Inferior orbital fissure
Optic canal

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6
Q

What is the most common fracture of the orbit and why?

A

Inferior blow out

Thinnest wall

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7
Q

What are the signs of an inferior orbital blow out fracture?

A

Restriction of upgaze

Enopthalmos

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8
Q

Where is the point on the retina where the highest concentration of light receptors are?

A

Fovea centralis/ macula

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9
Q

What makes up the inner layer of the eyeball?

A

Retina

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10
Q

What makes up the middle layer of the eyeball?

A

Choroid, cilliary body, iris

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11
Q

What makes up the outer layer of the eyeball

A

Cornea, sclera

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12
Q

What is the anterior segment of the eye?

A

Cornea to the lens

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13
Q

What is the posterior segment of the eye?

A

Lens to the retina

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14
Q

What is the anterior chamber of the eye?

A

Cornea to the iris

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15
Q

What is the posterior chamber of the eye?

A

Iris to the lens

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16
Q

What layer does the retina separate from in retinal detachment?

A

Choroid

17
Q

What fluid is in the posterior segment of the eye?

A

Vitreous humor

18
Q

What fluid is in the anterior segment of the eye?

A

Aqueous humor

19
Q

What is the arterial supply to the eyeball?

A

Opthalmic artery from the ICA

20
Q

What is the venous drainage of the eyeball?

A

Central retinal vein to the cavernous sinus

21
Q

What are the functions of the eyelids?

A

Protect from injury, excessive light and dryness

22
Q

What is a cilliary gland infection called?

A

Stye

23
Q

What is a tarsal gland infection called?

A

Meibomian cyst

24
Q

What facilitates movement of the eyelids?

A

Levator palpabrae superioris - CNIII

Orbicularis oculi - CNVII

Head and Neck (18 decks)

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