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RUSVM Micro Beth > Eye FINAL > Flashcards

Eye FINAL Flashcards

1
Q

The EYBALL aka ‘the globe’ , or the ‘eye bulb’ is located in the skull’s bony socket called….

A

the orbit.

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2
Q

The eye is composed of…..

A

The lens

Three Layers:

  1. Outer Fibrous Tunic
  2. Middle Vascular Tunic
  3. The Inner Retinal Tunic
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3
Q

The ________ also known as the accessory ocular structures are the supporting structures.

A

ADNEXA

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4
Q

The ADNEXA also known as the accessory ocular supporting structures include..

A

Palpabrae (eyelids)

Third Eyelid and Conjunctiva

The lacrimal apparatus

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5
Q

Identify A

A

Sclera of the Fibrous Tunic

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6
Q

Identify B

A

Cornea of the Fibrous Tunic

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7
Q

Identify C

A

Iris of the Vascular Tunic

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8
Q

Identify D

A

Ciliary Body of the Vascular Tunic

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9
Q

Identify E

A

Choroid of the Vascular Tunic

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10
Q

Identify F

A

Pigmented Layer of the Retina

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11
Q

Identify G

A

Neural Layer of the Retina

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12
Q

What are the Tunics of the eye?

A

Fibrous Tunic

Vascular Tunic

Neuro-Epithelial Tunic

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13
Q

Fibrous Tunic is composed of

A

A. Sclera

B. Cornea

C. Limbus

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14
Q

Vascular Tunic is composed of

A

A. Iridocorneal angle

B. Iris

C. Ciliary Body

D. Choroid

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15
Q

Neuro-Epithelial Tunic =

A

Retina

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16
Q

What tunic of the eye is labeled A?

A

Fibrous Tunic

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17
Q

What tunic of the eye is labeled B?

A

Vascular Tunic

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18
Q

What tunic of the eye is labeled C?

A

Nervous Tunic

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19
Q

What is the posterior, white, opaque layer of dense irregular connective tissue?

A

**Sclera **

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20
Q

What are the functions of the Sclera?

A
  1. Protects the eye
  2. Maintains the shape of the eye
  3. Provides insertion points for tendons of extraocular muscles.
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21
Q

What is the anterior portion of the eye? This is an avascular, transparent, convex-concave lens.

A

Cornea

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22
Q

What is outlined in the rectangle?

A

Cornea

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23
Q

The cornea is richly supplied by ________

A

sensory nerves (ophthalmic branch of Cr. N. V)

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24
Q

The cornea is relatively _________ to maintain transparency.

A

Dehydrated

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25
Q

True or False

The Cornea has remarkable regenerative capacity.

A

TRUE

26
Q

The Cornea is composed of ___ Layers.

A

5

27
Q

CORNEA. Name labels.

A
28
Q

CORNEA. What is 1?

A

Anterior Corneal Epithelium

29
Q

CORNEA: What is 5?

A

Posterior epithelium of cornea, corneal endothelium.

30
Q

CORNEA: What is 1?

A

Anterior corneal epithelium

31
Q

CORNEA: What is 2?

A

Anterior limiting membrane

32
Q

CORNEA: What is 3?

A

Stroma (substantia propria)

33
Q

CORNEA: What is 4?

A

Descemet’s membrane

34
Q

CORNEA: What is 5?

A

Posterior epithelium (corneal endothelium)

35
Q

•Corneal _____ is avascular and composed of dense connective tissue, with collagen bundles regularly arranged (parallel), embedded in ground substance (proteoglycans) that maintain a precise organization of the approximately ____layers of collagen.

A

Stroma

60

36
Q

•Cells of the corneal endothelium maintain transparency and optimal light refraction via active protein synthesis, and ________ allow passive transport of chloride and water.

A

Na+ Pumps

37
Q

Orientation of the collagenous laminae aids in _________ of cornea.

A

transparency

38
Q

What is going on here?

A

Corneal Ulcer

39
Q

______is the corneoscleral junction where the opaque sclera overlaps the transparent cornea. This area has small blood vessels.

A

Limbus

40
Q

•Microvasculature of limbus and aqueous humor of the anterior chamber provide ________ for the corneal.

A

Metabolites

41
Q

Vascular Tunic is composed of?

A

Iridocorneal Angle

Iris

Ciliary Body

Choroid

42
Q

________ is located anterior to the lens and separates the anterior and posterior chambers.

A

IRIS

43
Q

__________ suspends the lens, contains smooth muscle for accommodation; has processes covered by secretory epithelium.

A

CILIARY BODY

44
Q

•___________- vascular supply to optical retina. Contains pigment; TAPETUM LUCIDUM (in many species).

A

CHOROID

45
Q

•The limbus is the region where the transparent cornea merges with the ____________.

A

vascular sclera = S

46
Q

The epithelium of the limbus is continuous with the ___________that lines the eyelids

A

Conjunctiva (C)

47
Q

•The ______ is the shutter of the eye.

A

IRIS

48
Q

•The iris has a central opening, the _______, that communicates the anterior and posterior chamber.

A

PUPIL

49
Q

________ and ___________ muscles control amount of light to which the retina is exposed

A

Dilator and sphincter pupillae muscles control amount of light to which the retina is exposed

50
Q

•The ______ contains stroma of pigmented loose connective tissue, dilator and sphincter pupillae muscles and a posterior epithelium.

A

IRIS

51
Q

•Pigment or iridial melanin present in the ___________ determines eye color.

A

stromal cells

52
Q

________________ are present in equids and ruminants at the dorsal and ventral pupillary margins.

A

•Iridic granules (corpora nigra)

53
Q

•The iris forms half of _________________, also called filtration angle and drainage angle.

A

IRIDOCORNEAL ANGLE

54
Q

Label Image

A

AC= Anterior Chamber

CP = Constrictor Pupillae

PC = Posterior Chamber

55
Q

EYE COLOR

•____________ – minimal pigment in stroma of iris; pigment only in pigmented epithelium of iridal part of retina

A

•Blue iris

56
Q

•Increasing pigment in stroma – ______________

A

greenish/blue gray - brown iris

57
Q

__________ is an inherited congenital disorder, characterized by a partial or total lack of melanin pigment in the eyes, skin and hair or more rarely in the eyes alone.

A

Albinism

58
Q

•The _____________ is an anterior expansion of the choroid at the level of the lens with mechanical and secretory functions.

A

ciliary body

59
Q

The _________ is seen as a thickened ring of tissue lying just inside the anterior portion of the sclera.

A

Ciliary Body

60
Q

•Ciliary muscle (smooth muscle) has a _________ function, it contracts during accommodation, reduces tension of the zonular fibers of the lens.

A

mechanical

61
Q
A

RUSVM Micro Beth (2 decks)

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