RUSVM Micro Beth > Eye FINAL > Flashcards

Eye FINAL Flashcards

(61 cards)

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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
True or False The Cornea has remarkable regenerative capacity.
TRUE
26
The Cornea is composed of ___ Layers.
5
27
CORNEA. Name labels.
28
CORNEA. What is 1?
Anterior Corneal Epithelium
29
CORNEA: What is 5?
Posterior epithelium of cornea, corneal endothelium.
30
CORNEA: What is 1?
Anterior corneal epithelium
31
CORNEA: What is 2?
Anterior limiting membrane
32
CORNEA: What is 3?
Stroma (substantia propria)
33
CORNEA: What is 4?
Descemet's membrane
34
CORNEA: What is 5?
Posterior epithelium (corneal endothelium)
35
•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.
Stroma 60
36
•Cells of the corneal endothelium maintain transparency and optimal light refraction via active protein synthesis, and ________ allow passive transport of chloride and water.
Na+ Pumps
37
Orientation of the collagenous laminae aids in _________ of cornea.
transparency
38
What is going on here?
Corneal Ulcer
39
\_\_\_\_\_\_is the corneoscleral junction where the opaque sclera overlaps the transparent cornea. This area has small blood vessels.
Limbus
40
•Microvasculature of limbus and aqueous humor of the anterior chamber provide ________ for the corneal.
Metabolites
41
Vascular Tunic is composed of?
Iridocorneal Angle Iris Ciliary Body Choroid
42
\_\_\_\_\_\_\_\_ is located anterior to the lens and separates the anterior and posterior chambers.
IRIS
43
\_\_\_\_\_\_\_\_\_\_ suspends the lens, contains smooth muscle for accommodation; has processes covered by secretory epithelium.
CILIARY BODY
44
•\_\_\_\_\_\_\_\_\_\_\_- vascular supply to optical retina. Contains pigment; TAPETUM LUCIDUM (in many species).
CHOROID
45
•The limbus is the region where the transparent cornea merges with the \_\_\_\_\_\_\_\_\_\_\_\_.
vascular sclera = S
46
The epithelium of the limbus is continuous with the \_\_\_\_\_\_\_\_\_\_\_that lines the eyelids
Conjunctiva (C)
47
•The ______ is the shutter of the eye.
IRIS
48
•The iris has a central opening, the \_\_\_\_\_\_\_, that communicates the anterior and posterior chamber.
PUPIL
49
\_\_\_\_\_\_\_\_ and ___________ muscles control amount of light to which the retina is exposed
**Dilator** and **sphincter pupillae** muscles control amount of light to which the retina is exposed
50
•The ______ contains stroma of pigmented loose connective tissue, dilator and sphincter pupillae muscles and a posterior epithelium.
IRIS
51
•Pigment or iridial melanin present in the ___________ determines eye color.
stromal cells
52
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ are present in equids and ruminants at the dorsal and ventral pupillary margins.
•Iridic granules (corpora nigra)
53
•The iris forms half of \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_, also called filtration angle and drainage angle.
IRIDOCORNEAL ANGLE
54
Label Image
AC= Anterior Chamber CP = Constrictor Pupillae PC = Posterior Chamber
55
EYE COLOR •\_\_\_\_\_\_\_\_\_\_\_\_ – minimal pigment in stroma of iris; pigment only in pigmented epithelium of iridal part of retina
•Blue iris
56
•Increasing pigment in stroma – \_\_\_\_\_\_\_\_\_\_\_\_\_\_
greenish/blue gray - brown iris
57
\_\_\_\_\_\_\_\_\_\_ 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.
Albinism
58
•The _____________ is an anterior expansion of the choroid at the level of the lens with mechanical and secretory functions.
ciliary body
59
The _________ is seen as a thickened ring of tissue lying just inside the anterior portion of the sclera.
Ciliary Body
60
•Ciliary muscle (smooth muscle) has a _________ function, it contracts during accommodation, reduces tension of the zonular fibers of the lens.
mechanical
61
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