NBEO Part 1: Ocular Anatomy Exam
Questions and Answers with Verified
Solutions | Latest Updated 2026
eyelid 1. skin
-thinnest in the body, no fat
-glands
2. subcutaneous areolar - CT
3. orbicularis - orbital/palpebral
4. orbital septum
5. posterior muscular system - superior
levator
palpebrae, tarsal muscle of Muller
6. tarsal plate - CT
7. palpebral conj
orbital septum barrier, keeps infection out of orbit
-continuous with periorbita and periosteum
of skull
-attaches to posterior lacrimal crest
(doesn't
protect lacrimal sac)
,obicularis obicularis oculi
1. orbital portion - forced blink
2. palpebral portion - reflex
-muscle of riolan (pars ciliaris) - lid margin
on
globe
-muscle of horner (pars lacrimalis) -
canaliculi,
drain
superior palpebral levator main retractor
originates - lesser wing of sphenoid
-Whitnall's ligament - fulcrum
-levator aponeurosis
muscle of muller smooth muscle - sympathetic
palpebral conj 1. epithelial -stratified epi
-goblet cells (innermost layer of tear film)
2. stroma/submucosa/substantia propia
-immunologically active
-accessory lacrimal glands
glands of eyelid 1. zeis - sebaceous, eyelash follicles
2. moll - sweat, lid margin
3. krause - accessory lacrimal, fornices
4. wolfring - accessory lacrimal, tarsal conj
holocrine glands meibomian gland
whole cell shed into lumen
, apocrine glands Moll, goblet
portion of plasma membrane buds off and
enters
lumen for secretion
merocrine glands accessory lacrimal glands
secerete by exocytosis
nerves of eyelid 1. voluntary motor - zygomatic branch of
facial
(obicularis)
2. involuntary motor - sympathetic (muller)
3. sensory - trigeminal
arterial supply to eyelids 1. internal carotid - palpebral arcades
(ophthalmic
and lacrimal artery)
-marginal palpebral arcades - eyelid
margin
-peripheral palpebral arcades - fornices
2. external carotid
-facial branch
conj lymphatics 1. lateral - drain into parotid nodes
2. medial - drain into submandibular nodes
Questions and Answers with Verified
Solutions | Latest Updated 2026
eyelid 1. skin
-thinnest in the body, no fat
-glands
2. subcutaneous areolar - CT
3. orbicularis - orbital/palpebral
4. orbital septum
5. posterior muscular system - superior
levator
palpebrae, tarsal muscle of Muller
6. tarsal plate - CT
7. palpebral conj
orbital septum barrier, keeps infection out of orbit
-continuous with periorbita and periosteum
of skull
-attaches to posterior lacrimal crest
(doesn't
protect lacrimal sac)
,obicularis obicularis oculi
1. orbital portion - forced blink
2. palpebral portion - reflex
-muscle of riolan (pars ciliaris) - lid margin
on
globe
-muscle of horner (pars lacrimalis) -
canaliculi,
drain
superior palpebral levator main retractor
originates - lesser wing of sphenoid
-Whitnall's ligament - fulcrum
-levator aponeurosis
muscle of muller smooth muscle - sympathetic
palpebral conj 1. epithelial -stratified epi
-goblet cells (innermost layer of tear film)
2. stroma/submucosa/substantia propia
-immunologically active
-accessory lacrimal glands
glands of eyelid 1. zeis - sebaceous, eyelash follicles
2. moll - sweat, lid margin
3. krause - accessory lacrimal, fornices
4. wolfring - accessory lacrimal, tarsal conj
holocrine glands meibomian gland
whole cell shed into lumen
, apocrine glands Moll, goblet
portion of plasma membrane buds off and
enters
lumen for secretion
merocrine glands accessory lacrimal glands
secerete by exocytosis
nerves of eyelid 1. voluntary motor - zygomatic branch of
facial
(obicularis)
2. involuntary motor - sympathetic (muller)
3. sensory - trigeminal
arterial supply to eyelids 1. internal carotid - palpebral arcades
(ophthalmic
and lacrimal artery)
-marginal palpebral arcades - eyelid
margin
-peripheral palpebral arcades - fornices
2. external carotid
-facial branch
conj lymphatics 1. lateral - drain into parotid nodes
2. medial - drain into submandibular nodes
