The Eye and Orbit

lateral canthus

What is blacked out

bulbar conjunctiva

WHat is blacked out

palpebrae

What is another name for the eyelid

pupil

What is the name for the black middle of the eye

iris

What is the name for the part of the eye that gives it its color

lacrimal lake

What is blacked out

Caruncle

What is blacked out

medial canthus

What is blacked out

palpebral conjunctiva

What is blacked out

fornix

What is blacked out

supraorbital, supratrochlear

What nerves supply the skin portions of the V1 dermatome

infraorbital

What nerve supplies the skin portion of the V2 dermatome

frontal (V1)

What nerve supplies the forehead and scalp with sensation

lacrimal

What nerve supplies the lacrimal gland and upper eyelid with sensation

nasocilliary

What nerve supplies the medial orbit and upper nose with sensation

supratrochlear n

What is blacked out (nerve)

supraorbital n

What is blacked out (nerve)

nasocilliary n

What is blacked out (nerve)

frontal n

What is blacked out (nerve)

lacrimal n

What is blacked out (nerve)

supraorbital

What is blacked out (nerve)

anterior and posterior ethmoidal, infratrochlear

What are the branches of the nasocilliary nerve

anterior ethmoidal

What nerve does the external nasal branch come from

nasociliary

What is the ONLY nerve that supplies sensory info to the eyeball

V2 (infraorbital)

What nerve supplies sensory info to the lower eyelid

ethmoidal

What is blacked out (nerve)

supraorbital

What is blacked out (nerve)

Supratrochlear

What is blacked out (nerve)

infratrochlear

What is blacked out (nerve)

external nasal branch

What is blacked out (nerve)

palpebral

________ portion of orbicularis oris

orbital

________ portion of orbicularis oris

tarsal

_______ plates

superior

What tarsal plate anchors the tarsal muscle

tarsal glands

Tarsal plates contain

supraorbital

What is blacked out

optic canal

What is blacked out

superior orbital fissure

What is blacked out

inferior orbital fissure

What is blacked out

infraorbital groove and foramen

What is blacked out

anterior and posterior ethmoidal foramina

What is blacked out

frontal, ethmoid, sphenoid, lacrimal, maxilla, zygomatic

What 6 bones make up the orbit

ethmoid air cells

What is blacked out

sphenoid sinus

What is blacked out

maxillary sinus

What is blacked out

diplopia, infraorbital nerve damage, infections

complications of orbital blowout fractures

orbital blowout fracture

This patient presents with a

forebrain

The optic tracts are an extension of the

dural layers

The optic canal has all three

hydrocephalus

What can swell the optic disc and cause vision problems

papilledema

CSF buildup impedes venous drainage from eye, causes vision defects, usually bilateral, unilateral means pathology

papilledema

This buldging optic disc likely means

levator palpebrae superioris

What muscle elevates the upper eyelid

trochlear (CN IV)

What nerve innervates the superior oblique

Abducent (CN VI)

What nerve innervates the lateral rectus

lateral rectus, medial rectus

What two rectus muscles actually pull in the direction they say

medially

the superior rectus and the inferior rectus both pull

lateral

the opbital axis points more ____ than the visual axis

inferior rectus and superior oblique

verticle depression of the eye requires

superior rectus, inferior oblique

elevation of the eye (looking up) requires

cilliary muscles, sphnicter pupillae

What smooth muscles of the eye are under parasympathetic control

dilator pupliae, superior tarsal muscle

What two smooth muscles of the eye are under sympathetic control

superior tarsal muscle

What muscle is blacked out

cilliary musclex

What muscle is blacked out

dilator pupillae

What muscle is blacked out

sphincter pupillae

What muscle is blacked out

post-ganglionic

All sympathetic fibers in the head are

blood vessels and nerves

sympathetic fibers in the head follow

deep petrosal nerve, internal carotid nerve

What are the only two named symapthetic fibers in the head

edinger westphal nucleus

What is the nucleus for the PREganglionic parasympathetics of the eye

cilliary ganglion

What is the ganglion for the POSTsynaptic parasympathetic fibers of the eye

cilliary ganglion

What is blacked out

cilliary muscle

muscle contraction loosens the lens zonules & allows the lens to round up

cilliary muscle

What muscle accomidates for near vision

True

T/F: the pupillary reflex will still happen if one is unconcious

brainstem damae, CNIII compression, depressants, untreated syphalis

What can cause a slowed pupillary reflex

bilateral

With the pupillary reflex, constriction should be

left abducent nerve palsey (CN VI)

This patient is suffering from

abducent nerve (CN VI)

What nerve is MOST at risk for cavernous sinus pathology

CN VI in the cavernous sinus

The big arrow is pointing to

left oculomotor nerve palsey

This patient is suffering from

only retain lateral rectus and superior oblique (looking inferior and lateral), pupil dilation, ptosis

Left oculomotor nerve palsey symptoms

lacrimal gland, meibomian glands, conjunctival glands

What three glands produce tears

conjunctival glands

What tear glands contain goblet cells

CN VII (Facial)

tear production is controlled by

lacrimal gland and excretory ducts

The arrow is pointing to

inferior lacrimal papilla

blacked out

lacrimal curuncle

blacked out

lacrimal sac

Blacked out

lacrimal canaliculi

Blacked out

nasolacrimal duct

Blacked out

opening of nasolacrimal duct into inferior meatus

Blacked out

meibomian glands

specialized sebaceous gland

-contributes oily surface layer to tear film

-lipids seal lid margin to hold tear film in

place

-seal (waterproof) lids when closed

-reduce evaporation from deeper, aqueous

tear film layer (from lacrimal gland

meibomian glands

blacked out

conjunctival glands

mucus tear layer

lacrimal gland

aqueous tear layer

meibomian glands

lipid tear layer

tear film (conjunctival glands)

-flushes debris from ocular surface

-protects cornea from drying

-provides oxygen and nutrients to cornea

-contains antibacterial enzymes (e.g. lysozyme)

lacrimal gland

blacked out

conjunctival glands

blacked out