Intro to the eye

Question 1

3 Concentric tunics of eye

Answer 1

1. fibrous
2. uvea
3. retina

Question 2

What chamber is the lens in

Answer 2

posterior

Question 3

Parts of the vascular tunic

Answer 3

iris, ciliary body, and choroid

Question 4

parts of the fibrous tunic

Answer 4

sclera and cornea

Question 5

majority of the blood supply to the retina is from?

Answer 5

choroid capillaries

Question 6

Layers of the skin in eyebrow area

Answer 6

1.”skin” 2.subcatenous connective tissue, 3.muscular layer , 4. muscular areolar connective tissue, 5. pericranium

Question 7

Eyebrow muscles and their innervation

Answer 7

frontalis, corrugator, procerus and o.o

all innervated by the facial nerve

Question 8

Frontalis origin

Answer 8

galea aponeurotica within the scalp

Question 9

frontalis insertion interdigitates with

Answer 9

orbicularis, corrugator, and procerus

Question 10

Corrugator
origin?
where does it insert, and the type of look ?

Answer 10

frontal bone, inserts at middle part of eyebrow , creates concerned look and vertical furrows

Question 11

Procerus:
origin?
inserts?
expression?

Answer 11

nasal bone, skin of forehead , anger

Question 12

eyebrow muscle anterior to tarsal plate and orbital septum

Answer 12

obicularis oculi

Question 13

3 parts of O.O

Answer 13

orbital, preseptal , pretarsal

Question 14

striated and smooth muscles of the eyelids

Answer 14

striated (voluntary) : Levator palpebrae superioris and o.o

smooth (involuntary): sup and inf. tarsal (muller’s) symp innervation

Question 15

potential space between eyelids

from lateral and medial canthi

Answer 15

palpebral fissure

upper eyelid has to cover part of iris

Question 16

What is the lid crease called? and it’s two parts ?

Answer 16

Superioir palpebral sulcus

1. preseptal portion
2. tarsal portion

Question 17

where the skin meets the conjunctiva?

divided into 2 parts ?

Answer 17

eyelid margin

1. lacrimal portion 2.ciliary portions

Question 18

medial 1/6 of eyelid margin

Answer 18

lacrimal portion, involved in tear drainage

Question 19

lateral 5/6 of eyelid margin

Answer 19

ciliary portions , eyelashes , contains meibomian glands

Question 20

located b/w the eyelashes and the openings of the Meibomian glands

Answer 20

gray line

Question 21

part of orbicularis involved in tear drainage that can be seen through the gray line

Answer 21

riolan muscle

Question 22

behind the opening of the meibomian glands

transition between skin and palpebral conjunctiva

Answer 22

mucocutaneous junction

Question 23

loss of eyelashes

Answer 23

madarosis

Question 24

growth of eyelashes towards the eye

Answer 24

trichiasis

Question 25

entropion is due to

Answer 25

spams of the o.o muscle or scarring of the eyelid

Question 26

ectropion is due to

Answer 26

loss of tone of the o.o (aging)

Question 27

eyelid layers anterior to posterior

Answer 27

1. skin 2. muscle layer 3. submuscular areolar CT layer 4. tarsal plate 5. palpebral conjunctiva

Question 28

3 eyelid muscles and their inneration

Answer 28

1. o.o (sphinter: CNVII) 2. Levator palpebrae superioris ( upper lid: CNIII) 3. tarsal muscles ( upper and lower eyelids: smooth muscle/sympathetic)

Question 29

o.o eyelid portions and function

Answer 29

palpebral: blink orbital: squint riolan, jones, and horners muscles: tear drainage

Question 30

defect in closing the eye is called? mainly due to ? could cause?

Answer 30

lagophthalmos CNVII defect punctate keratitis

Question 31

Eyelid margin is divided into it’s two portions by the

Answer 31

Lacrimal papilla divides lacrimal and ciliary portions

Question 32

Portion of eyelid margin that contains the openings of the meibomian glands

Answer 32

Ciliary portion

Question 33

Superior palpebral levator originates from the _____ bone, as it enters the eyelid , it fans out into an aponeurosis , that inserts into the _____(3)

Answer 33

Sphenoid , 1. Tarsal plate, 2 skin of the superior eyelid , 3 the superior for is of the conjunctiva

Question 34

What is the levator aponeurosis and its 3 parts? Which attaches to the skin of the eyelid?

Answer 34

A facial tissue that connects the levator palpebrae sup. Muscle to the tissue of the upper eyelid. Parts: 1. Medial horn 2. Lateral horn 3. Middle portion Middle portion attaches tp the anterior tarsal plate, skin of upper eyelid, sup. Fornix of the conjunctiva

Question 35

What is the fibrous band that runs from the throclea of the sup. Oblique muscle to the fascia of the lacrimal gland

Answer 35

Whitnall’s ligament , acts as a fulcrum for the superior palpebral levator muscle

Question 36

Clinical correlation of tarsal muscles

Answer 36

Sympathetic innervation: horner’s syndrome

Question 37

Ptosis is due to weakness/ paralysis of the ____ and ___ muscles ? Which would cause a greater ptosis ?

Answer 37

Levator and tarsal muscles Levator damage causes a greater ptosis

Question 38

Dense connective tissue b/w the conjunctiva and submuscular connective tissue layers? Continuous with ?

Answer 38

Tarsal plate continuous w orbital septum

Question 39

Tarsal plate contain?

Answer 39

Meibomian glands

Question 40

What are the accessory lacrimal glands

Answer 40

Krause and Wolfring

Question 41

4 eyelid glands responsible for basal secretion of most of the tear film

Answer 41

1. Accessory glands 2 meibomian glands 3. Glands of Zeis 4. Glands of moll

Question 42

Internal vs external hordeolum

Answer 42

Internal - meibomian gland | External - glands of zeis and moll

Question 43

motor Innervation of tarsal muscles

Answer 43

Sympathetic - superior cervical ganglion

Question 44

Sensory innervation of eyelid

Answer 44

Branches of trigeminal CNV

Question 45

Blood supply to eyelids include

Answer 45

Internal carotid and external carotid branches

Question 46

Venous drainage of eyelids

Answer 46

Facial, superficial temporal and ophthalmic veins

Question 47

Potential risk of spread of infections from the eyelid is due to

Answer 47

Facial vein connecting to pterygoid plexus of veins

Question 48

Risk of intracranial spread of infections from eye lid is due to

Answer 48

Ophthalmic veins draining into the cavernous sinus

Question 49

Lymph nodes for lateral side of eyelid

Answer 49

Preauricular parotid lymph nodes

Question 50

Lymph nodes for medial side of eyelids

Answer 50

Submandibular lymph nodes