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Opthalmology > Anatomy Of The Eye > Flashcards

Anatomy Of The Eye Flashcards

0
Q

What makes up the outer fibrous layer?

A

Cornea
Sclera
Lamina cribosa

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1
Q

3 layers of the eye?

A

Outer fibrous
Middle vascular
Inner nervous

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2
Q

What makes up the middle vascular layer?

A

Iris
Ciliary body
Choroid

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3
Q

What makes up the inner nervous layer?

A

Pigment epithelium of retina
Retinal photoreceptor
Retinal neurones

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4
Q

What are the 3 compartments of the eye?

A

Anterior chamber
Posterior chamber
Vitreous chamber

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5
Q

What is aqueous humour?

A

Clear fluid containing water and electrolytes

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6
Q

5 layers of the cornea?

A 
Stratified squamous epithelium and basement membrane
Bowman layer
Stroma
Descemets membrane
Endothelium
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7
Q

How does active dehydration of the cornea occur?

A

Na/hco3 pumps

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8
Q

What does the iris sphincter do?

A

Constricts the pupil

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9
Q

2 parts of the inner ciliary body?

A

Pars pliccata

Pars plana

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10
Q

What is the para plana continuous with?

A

Choroid and retina

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11
Q

What does the aqueous humour fill?

A

Space between cornea and lens

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12
Q

Normal volume of aqueous humour.

A

3ml

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13
Q

Functions of aqueous humour

A

Hydrate and nourish cornea and lens

Maintains intra ocular pressure

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14
Q

How does the formation of aqueous humour occur?

A 
Secreted from ciliary process
Into posterior chamber
Enters anterior through pupil
Drains through trabecular mesh work 
Into canal of schlemm
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15
Q

How does humour compare to plasma?

A

More ascorbic acid

Less protein

16
Q

What attaches the lens to the ciliary body?

A

Zonalar fibres

17
Q

What relaxes to constrict the ciliary muscles?

A

Zonalar fibres

18
Q

What occurs when Zonalar fibres become taut?

A

Ciliary muscles relax

19
Q

Rods are used for?

A

Vision in dim light
Black and white vision
Wide visual field

20
Q

Cones are used for.

A

Acute vision
Detail
Colour vision

21
Q

Are retinal neurones myelinated?

A

All un myelinated

22
Q

Where do the retinal capillaries branch from ?

A

Central retinal artery

23
Q

What muscle closes the eye

A

Obicularis oculi

24
Q

What muscle opens the eye.

A

Levator palpebrae superioris

25
Q

3 layers of the tear film

A

Mucous layer
Aqueous layer
Oily layer

26
Q

What does the mucous layer of the tear film do.

A

Wets eyes

Produced by goblet cells

27
Q

What does aqueous layer of tear film do

A

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

28
Q

What does the aqueous layer contain

A 
Electrolytes
Protein
Lysozyme 
Igs
Oxygen
Glucose
29
Q

What produces the oily layer

A

Meibomian glands

Prevents excessive evaporation

30
Q

Tear flow order?

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

Opthalmology (8 decks)

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