Anatomy Of The Eye

Question 0

What makes up the outer fibrous layer?

Answer 0

Cornea
Sclera
Lamina cribosa

Question 1

3 layers of the eye?

Answer 1

Outer fibrous
Middle vascular
Inner nervous

Question 2

What makes up the middle vascular layer?

Answer 2

Iris
Ciliary body
Choroid

Question 3

What makes up the inner nervous layer?

Answer 3

Pigment epithelium of retina
Retinal photoreceptor
Retinal neurones

Question 4

What are the 3 compartments of the eye?

Answer 4

Anterior chamber
Posterior chamber
Vitreous chamber

Question 5

What is aqueous humour?

Answer 5

Clear fluid containing water and electrolytes

Question 6

5 layers of the cornea?

Answer 6

Stratified squamous epithelium and basement membrane
Bowman layer
Stroma
Descemets membrane
Endothelium

Question 7

How does active dehydration of the cornea occur?

Answer 7

Na/hco3 pumps

Question 8

What does the iris sphincter do?

Answer 8

Constricts the pupil

Question 9

2 parts of the inner ciliary body?

Answer 9

Pars pliccata

Pars plana

Question 10

What is the para plana continuous with?

Answer 10

Choroid and retina

Question 11

What does the aqueous humour fill?

Answer 11

Space between cornea and lens

Question 12

Normal volume of aqueous humour.

Answer 12

3ml

Question 13

Functions of aqueous humour

Answer 13

Hydrate and nourish cornea and lens

Maintains intra ocular pressure

Question 14

How does the formation of aqueous humour occur?

Answer 14

Secreted from ciliary process
Into posterior chamber
Enters anterior through pupil
Drains through trabecular mesh work 
Into canal of schlemm

Question 15

How does humour compare to plasma?

Answer 15

More ascorbic acid

Less protein

Question 16

What attaches the lens to the ciliary body?

Answer 16

Zonalar fibres

Question 17

What relaxes to constrict the ciliary muscles?

Answer 17

Zonalar fibres

Question 18

What occurs when Zonalar fibres become taut?

Answer 18

Ciliary muscles relax

Question 19

Rods are used for?

Answer 19

Vision in dim light
Black and white vision
Wide visual field

Question 20

Cones are used for.

Answer 20

Acute vision
Detail
Colour vision

Question 21

Are retinal neurones myelinated?

Answer 21

All un myelinated

Question 22

Where do the retinal capillaries branch from ?

Answer 22

Central retinal artery

Question 23

What muscle closes the eye

Answer 23

Obicularis oculi

Question 24

What muscle opens the eye.

Answer 24

Levator palpebrae superioris

Question 25

3 layers of the tear film

Answer 25

Mucous layer Aqueous layer Oily layer

Question 26

What does the mucous layer of the tear film do.

Answer 26

Wets eyes | Produced by goblet cells

Question 27

What does aqueous layer of tear film do

Answer 27

Produced by main lacrimal gland in superotemporal part of orbit in conjunctival stroma

Question 28

What does the aqueous layer contain

Answer 28

``` Electrolytes Protein Lysozyme Igs Oxygen Glucose ```

Question 29

What produces the oily layer

Answer 29

Meibomian glands | Prevents excessive evaporation

Question 30

Tear flow order?

Answer 30

``` Inferior and superior puncta to: Inferior and superior caniculi to: Common caniculi to: Lacrimal sac to: Nano lacrimal duct to: Nose ```