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Complete Review Course > Fundamentals Vol. 3 > Flashcards

Fundamentals Vol. 3 Flashcards

1
Q

How many tarsal meibomian gland orifices are located in the upper eyelid? Lower eyelid?

A

Upper eyelid - 30 to 40 Lower eyelid - 20 to 30

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2
Q

Where is the marginal arterial arcades of the eyelids located?

A

3 mm from the eyelid margin

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3
Q

Where does the pretarsal portion of the venous system of the eyelid drain? Posttarsal system?

A

Pretarsal- internal and external jugular veins Posttarsal - cavernous sinus

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4
Q

Where do the medial group of eyelid lymphatic vessels drain? Lateral group?

A

Medial groups- Submandibular lymph nodes Lateral group - Preauricular lymph nodes

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5
Q

What type of epithelium covers the caruncle?

A

Nonkeratinized, stratified squamous epithelium

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6
Q

What does the caruncle contain?

A

Sebaceous glands

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7
Q

What does the epithelium of the plica semiluminaris contain?

A

Goblet cells

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8
Q

What does the stroma of the plica semiluminaris contain?

A

Fat and nonstriated muscle

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9
Q

What structure divides the main lacrimal gland into two parts?

A

Levator aponeurosis

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10
Q

What are the two lobes of the lacrimal gland?

A

Orbital and palpebral lobe

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11
Q

How many ducts drain into the conjunctival fornix from the main lacrimal gland?

A

Approx. 12

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12
Q

Where do the ducts from the main lacrimal gland drain in the conjunctival fornix?

A

Approx. 5 mm above the superior margin of the tarsus

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13
Q

On what lobe the main lacrimal gland is biopsy typically performed?

A

Orbital lobe (in order to spare the drainage ducts of the lacrimal gland)

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14
Q

What are the 2 main type of cells located within the lacrimal glands?

A
  1. Acinar cells 2. Myoepithelial cells
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15
Q

Which type of cells line the lumen of the lacrimal glands?

A

Acinar cells (surrounded by myoepithelial cells)

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16
Q

What artery supplies the main lacrimal gland?

A

Lacrimal artery (branch of ophthalmic artery)

17
Q

What is the sensory innervation of the lacrimal gland?

A

Lacrimal nerve (CN V1)

18
Q

What is the average diameter of the lacrimal puncta?

A

0.3 mm

19
Q

Where is the inferior lacrimal punctum located?

A

6.5 mm from the medial canthus

20
Q

Where is the superior lacrimal punctum located?

A

6.0 mm from the medial cantus

21
Q

What type of epithelium lines the lacrimal puncta and canaliculi?

A

Stratified squamous, nonkeratinized epithelium

22
Q

Where does epithelium of the lacrimal drainage system separate into 2 layers?

A

Near the lacrimal sac

23
Q

What are the 2 layers of the epithelium of the lacrimal sac?

A
  1. Superficial columnar layer 2. Deep, flattened cell layer
24
Q

What are the 3 portions of the conjunctiva?

A
  1. Palpebral 2. Fornical 3. Bulbar
25
Q

What is the blood supply to the bulbar conjunctiva?

A

Anterior ciliary arteries

26
Q

Where is the vascular watershed of the conjunctiva located?

A

Approx. 3 to 4 mm from the limbus

27
Q

Where are the goblet cells of the conjunctiva concentrated?

A

Inferior and medial portions of the conjunctiva (esp. near the caruncle)

28
Q

Where on the conjunctiva are goblet cells absent?

A

Limbal region of the conjunctiva

29
Q

What is the anterior attachment of Tenon capsule?

A

Intramuscular septum (3 mm posterior to limbus)

30
Q

What 3 tendons form the suspensory ligament of Lockwood?

A
  1. Inferior rectus muscle. 2. Inferior tarsal muscle 3. Check ligaments of the medial and lateral rectus muscle
31
Q

What vessel forms the intramuscular circle of the iris?

A

Posterior ciliary vassel

32
Q

What vessel forms the intramuscular circle of the iris?

A

Posterior ciliary vessel

33
Q

What veins drain the choroid, ciliary body, and iris?

A

Vortex veins

34
Q

Where is the ampulla of the vortex veins located?

A

8 to 9 mm from the ora serrata

35
Q

What structure divides the central or posterior fundus from the peripheral portion?

A

Circle formed by the ampulla of the vortex veins

Complete Review Course (27 decks)

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