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BDS2.5 Anatomy > Eye - Intro > Flashcards

Eye - Intro Flashcards

1
Q

What are the 3 layers of the eyeball?

A

fibrous coat

vascular coat

sensory coat

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2
Q

What fibre makes up the outermost layer of the eye?

A

collagen

fibrous coat

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3
Q

What are the 2 parts of the fibrous coat?

A

cornea and sclera

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4
Q

Name A and B and what layer of the eye they make up?

A

A = cornea

B = sclera

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5
Q

What does the sclera make up of the eye?

A

The posterior 5/6 of the fibrous coat (white part)

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6
Q

What portion of the eye does the cornea make up?

A

Anterior 1/6, transparent

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7
Q

What makes up the vascular coat of the eye?

A

Iris

Ciliary body

Choroid

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8
Q

Name parts A-C and what part of the eye they belong to?

A

A = iris

B= ciliary body

C = choroid

Belong to the vascular layer of the eye

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9
Q

What part of the eye gives the colour to the eye?

A

Iris, behind the cornea

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10
Q

Where is the iris most deficient?

A

At the pupil

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11
Q

What part makes up the sensory coat?

A

Retina

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12
Q

What is A and what part of the eye does it belong?

A

Retina

Belongs to the sensory coat

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13
Q

What is different about the collagen fibres if the cornea and the sclera?

A

The sclera has collagen fibres of different diameters arranged irregularly, giving white opaque appearance

Cornea has fine uniform collagen fibres, allows light to pass through it and is transparent

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14
Q

What is the role of the iris?

A

Control the diameter of the pupil and thereby controls the amount of light rays entering the eyeball

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15
Q

What comes off of the ciliary body? What does it produce?

A

Suspensary ligaments/zonules, help to suspend the crystalline lense

Produces aqueous humor, fills all the space in front of the lense

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16
Q

What is the function of the choroid?

A

Supplies blood to outer layers if retina

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17
Q

What part of the eye produces the aqueous humor?

A

The ciliary body

18
Q

What is role of the retina?

A

Has light sensitive rods and cones which enables us to see

19
Q

What 3 structures fill the eyeball?

A

A= aqueous humor in anterior segment

B= lense

C = vitreous humor in posterior segment

20
Q

What is the role of the vitreous humor?

A

A gel which helps to push the retina back against the choroid

and prevent it from getting detached

21
Q

Is the crystalline lense opaque or transparent?

A

Transparent

22
Q

What is the structure of the crystalline lense?

A

Transparent

Crystalline biconvex structure

Suspended in zonules from ciliary body

It can change shake

23
Q
A
24
Q

What are the boundaries of the anterior and posterior segments of the eye?

A

Anterior = everything in front of the lense

Posterior = behind the lense

25
Q

What does the anterior segment of the eye contain?

A

Watery fluid called aqueous humor

26
Q

What does the posterior segment of the eye contain?

A

Filled with a gel called vitreous humor

27
Q

What is the role of the aqueous humor?

A

Maintain intratubular pressure

28
Q

What is the role of the vitreous humor?

A

Helps cushion the retina

29
Q

What can the anterior segment be subdivided into?

A

Anterior and posterior chambers

30
Q

Where is the anterior and posterior chamber? (of the anyerior chamber)

A

Anterior chamber informs of iris

Posterior chamber behind iris but infront of lense

31
Q

Name structures A - I

A

A = cornea
B = sclera
C = choroid
D = ciliary body
E = iris
F = posterior chamber
G = anterior chamber
H = suspensory ligaments
I = lense

32
Q

What do the red arrows show here?

A

Path of the aqueous humor

33
Q

Describe the pathway of the aqueous humor

A

Produced by the ciliary body, flows into the posterior chamber out through the pupil, to the anterior chamber, gets reabsorbed into a little canal

34
Q

What canal does the aqueous humor flow through?

A

Canal of schlemm’s

35
Q

What is the arrow pointing to?

A

Edge of the iris and the end of the sclera and start of cornea

The angle of the anterior chamber

36
Q

What is significant about the angle of the anterior chamber

A

Things that might push the iris up towards the angle of the anterior chamber

Occlude the. Able of the anterior chamber and the aqueous humor can no longer access the canal of schlemm and get drained

37
Q

What is the arrow pointing to and what does it do?

A

Trabecular meshwork

Aqueous humor flows out of the eye, into the Cana, of schlemm’s

38
Q
A
39
Q

Why can’t you see the ciliary body and choroid and retina?

A

The sclera is opaque

40
Q

What can you see through the pupil?

A

Lense

41
Q

If a patient has chateracs, how does the lense appear?

A

The lense has started to opacify, you will see a white or yellowish glow through the pupil of the eye

BDS2.5 Anatomy (28 decks)

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