LACRIMAL GLAND

Question 1

Where is lacrimal gland found?

Answer 1

Found in the fossa on the temporal side of the frontal bone

Question 2

What are the portion of the lacrimal gland?

Answer 2

Palpebral and orbital portions are found

Question 3

Why is the lacrimal gland divided into portions? due to what structure?

Answer 3

Tendon of superior levator palpebrae muscle

Question 4

What are the parts of the larcimal apparatus consists of?

Answer 4

Lacrimal gland
Accessory lacrimal gland
Lacrimal puncta
Lacrimal canaliculi
Lacrimal sac
Nasolacrimal duct

Question 5

Acessory lacrimal gland located in?

Answer 5

Subconj tissue from the fornix up to the tarsal plate

Question 6

Nasolacrimal drainage system consists of?

Answer 6

Lacrimal puncta
Canaliculi
Lacrimal sac
Nasolacrimal duct

Question 7

Where is lacrimal puncta found?

Answer 7

Found in a tissue that uplifed in the lacrimal papilla
There is a puncta in each upper and lower lid
Drains into a tube called canaliculus

Question 8

What is the 10mm long tube that connects each puncta to the lacrimal sac?

Answer 8

Canaliculi

Question 9

How long is the canaliculi and what does it connects?

Answer 9

it is 10mm long and connects each puncta to the lacrimal sac

Question 10

The canaliculi vertically how long?

The canaliclui medially how long?

Answer 10

2 mm

8 mm

Question 11

Why is it important to have angle of the canaliculi?

Answer 11

because it will prevent having back flow

Question 12

Which muscle contracts the canaliculi during eyelid closure to assist in tear drainage?

Answer 12

The muscle of Horner

Question 13

What is the function of the muscle of Horner?

Answer 13

it contracts the canaliculi during eyelid closure and helps for the tear drainage

Question 14

Lacrimal sac where is it found?

Answer 14

Found within a fossa in the medial orbital wall
Formed by joining of the maxillary and lacrimal bones
Orbital septum behind the sac

Question 15

What divides the lacrimal sac?

Answer 15

the medial palpebral ligament, from the tarsal plate, divides into 2 limbs that attach in front of and behidn the sac

Question 16

Nasolacrimal duct where is it found?

Answer 16

Lies next to maxillary sinus

Question 17

How long the nasolacrimal duct?

Answer 17

it is 15 mm long and travels along the nasolacrimal canal

Question 18

Where is naso-lacrimal duct terminates?

Answer 18

in the inferior meatus of the nasal cavity

Question 19

Valve of Hasner, where is this found?

Answer 19

Found at the end of the duct

Question 20

What is the function of the valve of hasner?

Answer 20

it prevents backflow of nasal fluids into the lacrimal drainasage system

Question 21

Which structure prevents the backflow of the nasal fluids into the lacrimal drainage system?

Answer 21

valve of hasner

Question 22

What is Dacryo-cystitis

Answer 22

it is an infection of the lacrimal sac

Due to naso-lacrmial duct blockage

Question 23

What is acute-dacryo-adenitis

Answer 23

result in acute swelling and discomfort in the upper lateral eyelid - which is the region of the lacrimal gland

Question 24

The blood supply of the lacrimal gland is recieved from?

Answer 24

the lacrimal artery

Question 25

The vein that drains the lacrimal gland joined by?

Answer 25

ophtlamic vein

Question 26

The nerve supply for the lacrimal gland is?

Answer 26

lacrimal nerve –> sensory –> trigeminal first division –> the great petrosal nerve –> parasympathetic seretory

Question 27

Parasympathetic secretory comes from?

Answer 27

superior salivary nucleus and is a branch of the facial nerve

Question 28

Sympathethic nerves accompanies

Answer 28

the lacrimal artery and the lacrimal nerve