Test 4 - Eyeball Parts and Functions

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29 Terms

1
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<p>What structure is this?</p>

What structure is this?

Ora Serrata

2
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<p>What structure is this?</p>

What structure is this?

Ciliary body

3
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<p>What structure is this?</p>

What structure is this?

Ciliary Zonule (suspensory ligament)

4
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<p>What structure is this?</p>

What structure is this?

Cornea

5
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<p>What structure is this?</p>

What structure is this?

Iris

6
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<p>What structure is this?</p>

What structure is this?

Pupil

7
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<p>What structure is this?</p>

What structure is this?

Anterior Pole

8
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<p>What structure is this?</p>

What structure is this?

Anterior Segment (contains aqueous humor)

9
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<p>What structure is this?</p>

What structure is this?

Lens

10
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<p>What structure is this?</p>

What structure is this?

Scleral Venous Sinus

11
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<p>What structure is this?</p>

What structure is this?

Posterior Segment (contains Vitreous humor)

12
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<p>What structure is this?</p>

What structure is this?

Sclera

13
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<p>What structure is this?</p>

What structure is this?

Choroid

14
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<p>What structure is this?</p>

What structure is this?

Retina

15
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<p>What structure is this?</p>

What structure is this?

Macula Lutea

16
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<p>What structure is this?</p>

What structure is this?

Fovea Centralis

17
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<p>What structure is this?</p>

What structure is this?

Posterior Pole

18
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<p>What structure is this?</p>

What structure is this?

Optic Nerve

19
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<p>What structure is this?</p>

What structure is this?

Central Artery and Vein of the Retina

20
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<p>What structure is this?</p>

What structure is this?

Optic Disc (blind spot)

21
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What is the function of the cornea?

It serves as a window to the eye and helps focus light rays

22
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What is the function of the Sclera?

  • Serves as an attachment point for the eye muscles

  • White portion of the eye

23
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What is the function of the Choroid coat?

  • Provides nourishment to the retina through the blood vessels it contains

  • covered in a dark brown pigment to absorb light

24
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What is the function of the Ciliary body?

  • Suspend the lens had helps focus it

  • Muscular layer

25
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What is the function of the lens?

  • Becomes rounder or flatter to focus light to different degrees

  • Supported by suspensory ligaments

26
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What is the function of the Iris?

  • Regulates the amount of light entering the eye through the pupil

  • Muscular ring

  • Eye color is determined by the amount and location of brown pigment in the iris

27
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What is the function of the Retina?

  • Action point of the eye

  • Contains the photoreceptors that detect light

  • Has two basic layers

28
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What is the outer layer of the Retina?

  • It’s a thin, pigmented layer that is in contact with the choroids coat

29
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What is the inner layer of the Retina?

  • Is the Visual, nervous layer composed of 3 principal layers of neurons:

    • Rods and cones - Initiate the electrical impulses (photoreceptors)

    • The impulses are then passed to bipolar neurons

    • the impulses are then passed to the ganglion neurons

  • Light has to go through the layers of ganglion neurons and bipolar neurons to reach the photoreceptors (rods and cones)

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