NBEO Part 1 - Anatomy Exam | Questions and
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Terms in this set (221)
Layers of the eyelid Skin
Subcutaneous areolar layer
Orbicularis layer
Submuscular areolar layer
Orbital septum
Posterior muscular system
Tarsal plate
Palpebral conjunctiva
Orbicularis muscle split into what 2 Orbital - forced closure of eyelids
portions? Palpebral - spontaneous/reflex blinking
What is another name for the muscle Pars ciliaris
of Riolan?
What is the function of the muscle of Keeps lid margin tightly applied to the globe
Riolan? during eye movements
Rotates the lashes
Where is the gray line found? The most anterior portion of the muscle of Riolan
, What is the importance of the gray It is a groove located between the eyelash
line? insertions and the meibomian glands
Divides the lid into anterior and posterior portions
Surgical landmark during lid repair
Ectropion occurs due to paralysis of Orbicularis
what muscle
What is another name for the muscle Pars lacrimalis
of Horner?
What is the function of the muscle of Encircles the canaliculi and helps drain tears into
horner? the lacrimal sac
What is the purpose of the orbital Prevents fat from falling down onto the lid margins
septum? Keeps infections localized to the anterior portion
of the eyelid, away from the orbit
Does the orbital septum protect the NO - the lacrimal sac is anterior to the attachment
lacrimal sac from infection? of the orbital septum to the posterior lacrimal crest
Where is the insertion for the levator At the superior orbital septum
aponeurosis?
What is the action of the superior Main retractor of the upper eyelid (15 mm)
palpebral levator muscle? Innervated by CN III
Innervation?
What forms the superior palpebral Insertion of the levator aponeurosis into the skin of
furrow? the upper eyelid
How is the muscle of Muller Sympathetic innervation
innervated?
Answers | Verified Solutions | 2026 Edition | Pass
Guaranteed
Save
Terms in this set (221)
Layers of the eyelid Skin
Subcutaneous areolar layer
Orbicularis layer
Submuscular areolar layer
Orbital septum
Posterior muscular system
Tarsal plate
Palpebral conjunctiva
Orbicularis muscle split into what 2 Orbital - forced closure of eyelids
portions? Palpebral - spontaneous/reflex blinking
What is another name for the muscle Pars ciliaris
of Riolan?
What is the function of the muscle of Keeps lid margin tightly applied to the globe
Riolan? during eye movements
Rotates the lashes
Where is the gray line found? The most anterior portion of the muscle of Riolan
, What is the importance of the gray It is a groove located between the eyelash
line? insertions and the meibomian glands
Divides the lid into anterior and posterior portions
Surgical landmark during lid repair
Ectropion occurs due to paralysis of Orbicularis
what muscle
What is another name for the muscle Pars lacrimalis
of Horner?
What is the function of the muscle of Encircles the canaliculi and helps drain tears into
horner? the lacrimal sac
What is the purpose of the orbital Prevents fat from falling down onto the lid margins
septum? Keeps infections localized to the anterior portion
of the eyelid, away from the orbit
Does the orbital septum protect the NO - the lacrimal sac is anterior to the attachment
lacrimal sac from infection? of the orbital septum to the posterior lacrimal crest
Where is the insertion for the levator At the superior orbital septum
aponeurosis?
What is the action of the superior Main retractor of the upper eyelid (15 mm)
palpebral levator muscle? Innervated by CN III
Innervation?
What forms the superior palpebral Insertion of the levator aponeurosis into the skin of
furrow? the upper eyelid
How is the muscle of Muller Sympathetic innervation
innervated?
