The Eye

Question 1

What is the base of the orbit

Answer 1

Orbital rim

Question 2

What is the roof of the orbit

Answer 2

Orbital part of frontal bone

Sphenoid

Question 3

What is the floor of the orbit

Answer 3

Orbital surface of maxilla
Zygomatic and palatine bones
Roof maxillary sinus
Inferior orbital fissure

Question 4

What is the medial wall of the orbit

Answer 4

Maxilla 
Lacrimal
Ethmoid
Sphenoid 
Anterior and posterior ethmoid a, foraminae

Question 5

What is the lateral wall of the orbit

Answer 5

Zygomatic

Greater wing of shpenoid

Question 6

What are the parts of the muscle around the orbit area

Answer 6

Palpebral - on eyelids

Orbital - around orbit

Question 7

What is the orbicularis oculi

Answer 7

Muscle of facial expression

Sphincter of the eye

Question 8

What are the tarsal plates

Answer 8

Skelton of eyelid

Dense bands of connective tissue

Question 9

What is embedded in the tarsal plates

Answer 9

The tarsal glands lubricate eyelids prevent sticking together

Question 10

What to medial and lateral palpebral ligaments do

Answer 10

Act as anchor to the skeleton of eyelids

Question 11

What is the levator palpebrae superioris

Answer 11

Muscle tendon

Dual motor nerve supply from oculomotor and and sympathetic

Question 12

What does the palpebrae conjunctive cover

Answer 12

Internal surface of eyelids

Reflected onto eyeball and continuous to bulbar conjunctiva which is transparent

Question 13

What does the bulbar conjunctive cover

Answer 13

Sclera

Question 14

What does the bulbar conjunctive contain

Answer 14

Small blood vessels

Question 15

What does the lacrimal gland produce

Answer 15

Tears

Question 16

What type of innervation does the lacrimal glamd receive

Answer 16

Parasymp from facial nerve

Question 17

What is the pupil

Answer 17

Variable sized black circular opening

Regulates amount of light into the eye

Question 18

What does e iris attach onto

Answer 18

Sphincter pupillae muscle which contracts the pupil and the dilator pupillae which opens the pupil

Question 19

What is the sclera

Answer 19

Opaque white

Fibrous protective layer of the Eh

Question 20

What is the lacrimal apparatus

Answer 20

Containing orbital structures for tear production and drainage

Question 21

How many layers does the eye consist of and what are those laters

Answer 21

3

• outer fibrous layer
• vascular pigmented layer
• inner layer mural retina layer

Question 22

What does the vitreous humour do

Answer 22

Support the lens and retina

Question 23

What does the ciliary body do

Answer 23

Produce the aq humour and control lens

Question 24

What is the darker spot at the back of the eye called

Answer 24

Macula area of most acute vision

Question 25

How does the ciliary body change the lens

Answer 25

Contrcating suspensory ligaments

Question 26

What are the extraocular muscles

Answer 26

4 rectus - inferior, superior,lateral and medial
2 oblique - superior and inferior
Levator palpebrae

Question 27

What cranial nerves supply what extraocular muscles

Answer 27

Lateral rectus - abducens
Superior oblique - trochlear
The rest oculomotor but the levator palpebrae superioris also has a sympathetic innervation

Question 28

What are the divisions of the Opthalmic Nerve at the supra orbital fissure

Answer 28

Frontal - supra trochlear supra orbital
Lacrimal
Nasociliary - posterior ethmoid, infra trochlear, anterior ethmoidal ( external nasal)

Question 29

What is the Apex of the orbit

Answer 29

The optic foramen