Eye - Orbit

Question 1

Answer 1

A = frontal bone

B = zygomatic

C = maxilla

D = lacrimal

E = ethmoid

F = lesser wing of sphenoid

G = greater wing of sphenoid

H = palatine bone

Question 2

What walls of the orbit are particularly weak?

Answer 2

Medial and inferior walls

Question 3

Why are the medial and inferior walls of the orbit weak?

Answer 3

Paranasal air sinuses

Question 4

Name the sinuses in the x-ray

Answer 4

A = frontal

B = ethmoid air cells

C = maxillary sinus

Question 5

What scan produced this image?

Answer 5

MRI scan

Question 6

What is the anterior posterior length of the eyeball?

Answer 6

Around 24 mm

Question 7

What is the anterior posterior length of the orbit?

Answer 7

Around 40 mm

Question 8

What is the white in this MRI scan?

Answer 8

Orbital fat?

Question 9

What is the role of orbital fat?

Answer 9

Helps cushion the eyeball and help eyeball sit where it should

Question 10

What occurs in thyroid eye disease?

Answer 10

Hypertrophy of orbital fat, push eyeball more outwards

Question 11

When will the eye sink back?

Answer 11

Starvation - hypotrophy

Question 12

Answer 12

Question 13

What is the role of the tarsal plate?

Answer 13

Made of dense connective tissue, helps you maintain the shape of the eyeball

Question 14

What glands are within the tarsal plate?

Answer 14

Meibomian glands

Question 15

What do the meibomian glads secrete? What is the role of this secretion?

Answer 15

Oily substance

Lines the outside if the tear film and krevents it from evaporating

Question 16

A-G

Answer 16

Question 17

What does LPS stand for?

Answer 17

Levator palpebrae superioris

Question 18

What gland hold the hair follicles?

Answer 18

Sebaceous glands

Question 19

Answer 19

Question 20

Where does the connective end?

Answer 20

Where the sclera meets the cornea

Question 21

What covers the sclera?

Answer 21

Transparent connectiva

Question 22

Do the blood vessels belong to the conjunctiva or the sclera?

Answer 22

Conjunctiva

Question 23

What gland is this?

Answer 23

Lacrimal gland

Question 24

What kinds of secretion is produced by the lacrimal gland?

Answer 24

Watery secretion

Question 25

What type of innervation stimulates the lacrimal gland?

Answer 25

Parasympathetic from facial nerve

Question 26

What nerve stimulates the lacrimal gland?

Answer 26

Facial nerve

Question 27

What do the secretions from the lacrimal gland cover?

Answer 27

The outside of the sclera conjunctiva and cornea

Anterior aspect

Question 28

Where do the ducts of the lacrimal ducts open onto?

Answer 28

The conjunctival sac

Question 29

Where does the watery secretion form the lacrimal gland drain?

Answer 29

2 holes associate at the medial corner of the eyelid, connected to 2 rubes called the canaliculi, they go into the sacs… Into the lacrimal sacs

In the medial corners of the eyelid

Question 30

Where does the lacrimal duct drain into?

Answer 30

Naso-lacrimal duct and open into the nasal cavity below

Into the inferior meat us of the nasal cavity