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ANAT-A 215 Exam 3 > Eye > Flashcards

Eye Flashcards

1
Q

Eyelids Name

A

Palpebrae

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2
Q

Sclera

A

“Whites” of the eyes

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3
Q

Cornea

A

Transparent enter part in front of Iris

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4
Q

Iris

A

Pigmented part of the eye

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5
Q

Pupil

A

Opening in the Iris

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6
Q

Conjunctive Definition

A

Lining sclera and eyelid

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7
Q

Conjunctiva Function

A

Secrete mucus as lubricant for eyes/eyelids

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8
Q

Lacrimal Apparatus Function

A

Produces/Collects tears (Lacrimal Fluid)

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9
Q

Lacrimal Gland

A

Produces and secretes tears

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10
Q

Eye Fluid

A

Fluid is swept across the surface of the eye by the eyelids. Goes from lateral to medial

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11
Q

Lacrimal Canaliculi

A

From Lacrimal Duncti to Nasalacrimal Duct

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12
Q

Nasolacrimal Duct

A

Drains tears into nasal cavity, where they are eventually swallowed

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13
Q

When a person cries, tears spill onto the cheek and person gets a runny nose. What is happening?

A

Tears flood lacrimal duct

Lacrimal duncti can’t collect all of the tears

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14
Q

Medial Rectus

A

Moves eye medially (Adducts)

Looking into middle of body

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15
Q

Lateral Rectus

A

Moves eye laterally (Abducts eye)

Away from body, looking out

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16
Q

Superior Rectus

A

Elevates eye and moves eye medially (Adducts Eye)

Look Up

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17
Q

Inferior Rectus

A

Depresses eye and moves eye medially

Looking Down

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18
Q

Superior Oblique

A

(Between Superior and Medial)

Depresses eye and moves eye laterally

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19
Q

Inferior Oblique

A

Elevates eye and moves eye laterally

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20
Q

Lens Definition

A

Biconvex, transparent structure inside eyeball

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21
Q

Lens Function

A

Changes shape (flat or rounded) to focus light rays

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22
Q

Lens held in place by?

A

Suspensory Ligaments

More rounded when looking closely at an object, flattened when looking far away

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23
Q

3 Eyeball Layers

A

Fibrous (External) Tunic
Vascular tunic
Retina

24
Q

Fibrous (External) Tunic

A

It is avascular

25
Q

Fibrous Tunic Components

A

Sclera

Cornea

26
Q

Fibrous Tunic; Sclera

A

Posterior 5/6 of eye

27
Q

Fibrous Tunic; Sclera Function

A

To provide shape to the eyeball and protect inner parts

28
Q

Fibrous Tunic; Cornea

A

Curved, transparent structure anterior to Iris and Pupil

Anterior 1/6 of eye

29
Q

Fibrous Tunic; Cornea Function

A

Admits and refracts (bends) light

30
Q

Laser Vision Correction

A

Laser removes some cells from the middle part of the cornea to change its shape so that it can let in more light

31
Q

Vascular Tunic Components

A

Choroid
Ciliary Body
Iris

32
Q

Vascular Tunic; Choroid

A

Dark brown membrane

33
Q

Vascular Tunic; Choroid Function

A

Contains many tine blood vessels that help nourish the retina

34
Q

Vascular Tunic; Ciliary Body

A

A ring of smooth muscle tissue that surrounds the lens.

Attaches to lens via suspensory ligaments

35
Q

Vascular Tunic; Ciliary Body Functions

A
  1. As the smooth muscle contracts, suspensory ligaments relax to make the lens more round
  2. Produces Aqueous Humor
36
Q

Vascular Tunic; Iris

A

Pigmented, colored part of eye

Pupil

37
Q

Vascular Tunic; Iris Function

A

Regulates the amount of light entering eye (by enlarging [dilating] or narrowing [constricting])

38
Q

Retina Components

A

Pigmented Layer

Neural Layer

39
Q

Retina

A

Posterior 3/4 Of eye

40
Q

Retina; Pigmented Layer

A

Outer layer Adjacent to choroid

41
Q

Retina; Pigmented Layer Function

A

Absorbs excess light to prevent reflection/glare

Provides Vitamin A to neural layer

42
Q

Retina; Neural Layer

A

Inner Layer

43
Q

Retina; Neural Layer Functions

A

Its photoreceptors receive light information and convert it into nerve impulses that are sent via CN II (Optic Nerve) to the brain

44
Q

Two Types of Photoreceptors

A

Rods

Cones

45
Q

Rods Definition

A

Low Light, only see Black and White

46
Q

Cones Definition

A

Require more light, but these let you see in color

47
Q

Optic Disc (“Blind Spot”)

A

Area where the optic nerve exits the eye.
Contains no photo receptors
Can’t detect light at that spot, taking information to brain from eye

48
Q

Macula Lutea

A

Lateral to the optic disc

49
Q

Fovea Centralis

A

In the center of Macula Lutea

Contains sharpest vision (Only Cones)

50
Q

Detached Retina

A

Fluid collects between the pigmented layer and the neural layer of the retina. (Cuts off photoreceptors from their blood supply and source of Vitamin A) Retina needs Vitamin A to function

51
Q

Internal Chambers of the Eye

A

Anterior Cavity

Posterior Cavity

52
Q

Anterior Cavity

A

Between Cornea and Lens

Filled with Aqueous Humor

53
Q

Aqueous Humor

A

Supplies nutrients and removes waste for lens and Cornea; Continually being produced and wasted

54
Q

Posterior Cavity

A

Between Lens and Retina

Contains Vitreous Humor

55
Q

Vitreous Humor

A

Helps maintains shape of eye and keeps retina against choroid. This is not continually produced (This jelly substance only produced once at birth; Reason for big eyes in children)

ANAT-A 215 Exam 3 (16 decks)

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