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Study for In-Service Flashcards

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1
Q

What is Dermatochalasis?

A

Excesss eyelid skin

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2
Q

What is the technical term for excess eyelid skin?

A

Dermatochalasis

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3
Q

What is Blepharochalsis?

A

Thin eyelid skin secondary to recurrent edema

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4
Q

What is the technical term for thin skin of the eyelids often caused by recurrent edema?

A

Blebharochalasis

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5
Q

What is Steatoblepharon?

A

Fat protrusions secondary to septal attenuation

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6
Q

What is the fat protrusion of the eyelid caused by septal attenuation called ?

A

Steatoblepharon

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7
Q

What is Pseudoblepharoptosis?

A

Normal lid position but with a ptotic appearance due to brow position and excess skin

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8
Q

What is the technical term for a normal lid position with ptotic appearance due to brow position and excess skin?

A

Pseudoblepharoptosis

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9
Q

How thick is the eyelid skin?

A

0.5 - 0.7 mm

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10
Q

What are the 3 Lamella of the Eyelid

A

Anterior, Middle, Posterior

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11
Q

What are the components of the anterior lamella?

A

Skin, Orbicularis Oculi

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12
Q

What are the component portions of the orbicularis oculi

A

PreTarsal, PreSeptal, and Orbital Portions

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13
Q

Which components of the orbicularis oculi are involved in voluntary lid closure?

A

Orbital Portion

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14
Q

Which components of the orbicularis oculi are involved in involuntary lid closure?

A

PreTarsal and PreSeptal Portions

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15
Q

What is the dual innervation of the orbicularis oculi

A

Temporal and Zygomatic Branches of the Facial Nerve

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16
Q

What are the components of the middle lamella?

A

The PreSeptal Fat, The Orbital Septum, and the Orbital or Post-Septal Fat.

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17
Q

How does the preseptal fat differ between the upper and lower eyelid?

A

The Upper eyelid has the Retro-Orbicularis Oculi Fat - the ROOF; The Lower Eyelid has the Suborbicularis Oculi Fat or SOOF

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18
Q

Which eyelid has the ROOF?

A

Upper Eyelid

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19
Q

Which eyelid has the SOOF?

A

Lower Eyelid

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20
Q

What is the ROOF of the Eyelid?

A

Retro-Orbicularis Oculi Fat

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21
Q

What is the SOOF of the Eyelid?

A

The Suborbicularis Oculi Fat

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22
Q

What is the Orbital Septum

A

The Anatomic Boundary between the Eyelid and the Orbit

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23
Q

From what structures does the Orbital Septum Arise

A

The Periosteal confluence of the superior and inferior orbital rim

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24
Q

In the upper eyelid what does the Orbital Septum Fuse With?

A

The Levator Aponeurosis

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25
In the Lower Eyelid what does the Orbital Septum Fuse With?
The Capsulopalpebral Fascia
26
What are the 2 Components of the Orbital/Post-Septal Fat present in the Upper Eyelid?
The Nasal and Central Components
27
What are the 3 Components of the Orbital/Post-Septal Fat Present in the Lower Eyelid?
The Medial, Central, and Lateral
28
What separates the Nasal and Central Fat Compartments of the Upper Lid?
The Trochlea and Superior Oblique Tendon
29
What separated the Medial and Central Fat Compartments of the Lower Lid?
The Inferior Oblique Muscle
30
What are the components of the Posterior Lamella?
The Tarsal Plate, The Lid Retractors, and the Conjunctiva
31
What is the Tarsal Plate?
A cartilaginous structure of dense connective tissue which provides structural support and rigidity to the eyelid
32
How thick is the tarsal plate of the Eyelid?
~1 mm
33
How long is the tarsal plate of the Eyelid?
~25 mm
34
How tall is the superior tarsal plate of the Eyelid?
~10 mm tall
35
How tall is the inferior tarsal plate of the Eyelid?
~4 mm tall
36
What are the Upper Lid Retractors of the Eyelid?
The Levator Palpebrae Superioris and Mueller's Muscle
37
What is the Innervation of the Levator Palpebrae Superioris?
CNIII
38
What is the Innervation of Mueller's Muscle?
Sympathetic Nervous System
39
What are the Lower Lid Retractors of the Eyelid?
The Capsulopapebral Fascia and the Inferior Tarsal Muscle
40
What is the Innervation of the Interior Tarsal Muscle of the Eyelid?
Sympathetic Nervous System
41
What is the Palpebral Conjunctiva
The Posterior Surface of theEyelids
42
What is the Bulbar Conjunctival?
The Anterior Surface of the Globe of the Eye
43
Are are the conjunctival fornices?
The apices where the palpebral and bulbar conjunctiva
44
To which Lamella does the Tarsal Plate belong?
Posterior
45
To which Lamella do the Upper Lid Retractors belong?
Posterior
46
To Which Lamella does the Conjunctiva belong?
Posterior
47
To which Lamella does the Pre-Septal Fat Belong?
Middle
48
To Which Lamella does the Orbital Septum Belong?
Middle
49
To which Lamella does the Orbital/Post-Septal Fat Belong?
Middle
50
To Which Lamella does the skin of the Eyelid Belong?
Anterior
51
To Which Lamella does the Orbicularis Oculi Belong?
Anterior
52
What structure is at risk between the nasal and central fat compartments of the upper eyelid?
The Trochlea and Superior Oblique Tendon
53
What structure is at risk between the medial and central fat compartments of the lower eyelid?
The Inferior oblique muscle
54
What is the origin of the levator palpebrae superioris?
The esser wing of the sphenoid - it broadens as an aponeurosis at Whitnall's ligament
55
What is the insertion of the levator palpebrae superioris?
The Superior Tarsis and Dermis
56
What superficial structure is formed by the insertion of the levator palpebrae superioris?
The Supratarsal Crease
57
What lid elevation is achieved by the Levator Palpebrae Superioris
10-15 mm
58
What is the Origin of Mueller's Muscle
The Deep Surface of the Levator Aponeurosis
59
What is the Insertion of Mueller's Muscle?
The Superior Tarsal Margin
60
What lid elevation is achieved by Mueller's Muscle?
1-2 mm
61
What is the Capsulopalpebral Fascia?
A fascial sling acting as the lower lid analogue to the levator aponeurosis
62
What is the Origin of the Capsulopalpebral Fascia?
The Inferior Rectus Muscle
63
What is the Path of the Capsulopalpebral Fascia from its origin?
Starts at the Inferior Rectus Sheath and then splits at the inferior oblique muscle to reunite at Lockwood's suspensory ligament
64
What is the insertion of the Capsulopalpebral Fascia?
The Inferior Tarsus
65
What is the Inferior Tarsal Muscle?
The lower lid analogue to Mueller's Muscle
66
What is the Origin of the Inferior Tarsal Muscle
The Posterior Capsulopalpebral Fascia
67
What is the Insertion of the Inferior Tarsal Muscla
The Inferior Tarsal Margin
68
What is the Origin of the Lateral Canthal Tendon
The Lateral Margin of the Superior and Inferior Tarsal Plates
69
What is the Insertion of the Lateral Canthal Tendon
Whitnall's Tubercle
70
What is Whitnall's Tubercle
A bony prominence located 5 mm within the lateral orbital rim
71
What is the Origin of the Medial Canthal Tendon
Medial Margin of the Superior and Inferior Tarsal plates
72
What is the Insertion of the Medial Canthal Tendon
Tripartite - Superficial Head inserts on the frontal process of the maxilla; the Deep head inserts on the posterior lacrimal crest; the vertial head inserts on the orbital process of the frontal bone
73
Which head of the medial canthal tendon provides the majority of support?
The Superficial head
74
Which head of the medial canthal tendon has a function in the tear pump mechanism?
The Vertical Head
75
What are the Three Heads of the Medial Canthal Tendon?
The Superficial, Deep, and Vertical Heads
76
What is the primary blood supply of the upper lid of the eyelid?
The Ophthalmic Artery - Internal Carotid
77
What is the primary blood supply of the lower lid of the eyelid?
The Facial Artery - External Carotid
78
What are the 2 vascular arcades of the eyelid?
The Marginal Arcade and the Peripheral Arcade.
79
What provides sensory innervation to the upper eyelid?
The Ophthalmic Division (V1) of CNV
80
What provides sensory innervation to the lower eyelid?
The Maxiallary Division (V2) of CNV
81
What are the Soft Tissue Layers of the Scalp?
The Skin, Subcutaneous Tissue, Aponeurosis/Galea, Loose Areolar Tissue, Pericranium

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