The Eyelid

Question 1

What is an eyelid?

Answer 1

musculoskeletal-cutaneous structure

Question 2

role of the eyelid?

Answer 2

• Eyeball protection
• Lacrimal drainage
• Facial expression

Question 3

what seperate between The two eyelids?

Answer 3

palpebral fissure

Question 4

where the two eyelids meet?

Answer 4

• canthus: intern and extern

Question 5

What are the parts of the eyelid?

Answer 5

• Marginal
• Tarsal
• Palpebral

Question 6

What is the tarsal part?

Answer 6

between the margin and palpebral fold or crease

Question 7

What is the orbital part?

Answer 7

• beyond the palpebral fold

Question 8

What is the continuation of the lower palpebral region with the face?

Answer 8

• Nasolabial fold or furrow

Question 9

What cover the posterior palpebral side?

Answer 9

• the palpebral conjunctiva

Question 10

length of margins?

Answer 10

30 mm

Question 11

the thickness of the margin?

Answer 11

2-30 mm

Question 12

The two parts of the margins?

Answer 12

• Lacrimal: 1/5, intern, without eyelashes
• Ciliary: 4/5 outer with eyelashes

Question 13

what forms the intern angle?

Answer 13

• The two lacrimal portions

Question 14

What forms the external angle?

Answer 14

• The upper and lower margins

Question 15

what are the anatomical structures in the internal margin?

Answer 15

• Plica seminularis
• cranucle

Question 16

role of the septum?

Answer 16

• transmits vasculo-nervous elements and ensures the contention of the orbital fat:

Question 17

What is the tarsal plate?

Answer 17

fibrous connective tissue that give the shape of the eye

Question 18

How the internal and extenal palpebral ligaments?

Answer 18

the meeing of the two tarsus

Question 19

What are the two palpebral muscles?

Answer 19

• levator palpebral superioris
• orbicularos oculi

Question 20

The action of te levator palpebral superioris?

Answer 20

• palpebral Opening

Question 21

The innervation of the levator palpebral superioris?

Answer 21

• The occulomotor nerve

Question 22

the origin of the levator palpabral superioris?

Answer 22

The apex of the orbit

Question 23

The action of the Orbicularis oculi?

Answer 23

the palpebral occlusion

Question 24

The innervation of the orbicularis oculi?

Answer 24

facial nerve

Question 25

The parts of the Orbi Ocu

Answer 25

- The Orbital - The palpebral

Question 26

what are the parts of palpebral portion of the Orbicul oculi?

Answer 26

- marginal - pretarsal - preseptal

Question 27

What is the other name of marginal portion

Answer 27

ciliary muscle or Riolan muscle

Question 28

Where the pretarsal portion is attached to?

Answer 28

- Canthal tendon

Question 29

What are the three glands of the eyelid?

Answer 29

- Moll's : sweat - Zeiss: sebaceous - Meibomius: sebaceous

Question 30

where the Moll's gland located?

Answer 30

The lid margin

Question 31

where the Zeiss located

Answer 31

attached to the eyelashes

Question 32

Where the Meimbomius located

Answer 32

tarsal thickness

Question 33

Stye vs Chalazion

Answer 33

- stye: obstruction of the zeiss - Chalazion: obstruction of the Meimbomius

Question 34

The arterial vascularization of the eyelid?

Answer 34

- palpebral arteries: superior and inferior < branches of ophthalmic artery

Question 35

The venous supply?

Answer 35

- Upper lid: angular vein - Lower lid: facial vein

Question 36

Lymphatics?

Answer 36

- Sbcutaneous and subconjunctival < submaxillary nodes

Question 37

Innervation?

Answer 37

- Trigeminal branches - inside: nasal branch - outside: Lacrimal - upper: frontal - lower: infra-orbital