The Eyelid

Question 1

what is the muscle of the external eyelid?

Answer 1

orbicularis oculi

Question 2

what innervates orbicularis oculi?

Answer 2

CNVII

Question 3

two parts of orbicularis oculi?

Answer 3

orbital part (screwing eyes shut)
palpebral part (gentle closure)

Question 4

what is the internal eyelid made up of?

Answer 4

fibrous skeleton with superior and inferior tarsus with medial and lateral palpebral ligaments with an orbital septum and tendon of LPS

Question 5

what does the smooth muscle of LPS do?

Answer 5

opens eyes wider

Question 6

what gland is within each tarsus?

Answer 6

tarsal glands (meibomian glands)

Question 7

role of the tarsal glands

Answer 7

secrete lipids that line the eyelid and stop lacrimal fluid from overflowing

Question 8

where is the lacrimal gland located?

Answer 8

superolaterally

Question 9

what innervates the lacrimal gland?

Answer 9

CNVII

Question 10

pathway of the lacrimal apparatus

Answer 10

lacrimal gland passes fluid onto the cornea and it washes over lateral > medial
collects medially at the lacrimal lake
drains through lacrimal puncta into canaliculi through the lacrimal sac into the nasolacrimal duct (inferior nasal meatus)