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Anatomy Module 8 > Ocular Anatomy > Flashcards

Ocular Anatomy Flashcards

1
Q

Thin, transparent vascular tissue that extends from the limbusto the mucocutaneousjunction of the eyelid

A

Conjunctiva

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2
Q

2 types of conjuctiva

A

Bulbar and Palpebral Conjuctiva

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3
Q

lines the inner aspect of the eyelids

A

Plpebral conjuctiva

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4
Q

covers the sclera

A

Bulbar

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5
Q

Blodd supply of conjuctiva

A

anterior ciliaryartery

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6
Q

Nerve supple of conkuctiva

A

1st division of CN V (ophthalmic division)

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7
Q

Fine, thin, elastic layer which covers the sclera
Underneath the conjunctiva
Contains numerous blood vessels –> provide nourishment for the sclera

A

Epiclera

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8
Q

Thick outer coat of the eye
Normally white and opaque
Avascular& fibrous (collagen

A

Sclera

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9
Q

Anterior and Posterior Extensions of sclera

A

Continuous with the cornea anteriorlyand with the duralsheath of the optic nerve posteriorly

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10
Q

Size of sclera

A

0.3 mm thick where the EOM’s insert

about 1 mm thick elsewhere

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11
Q

Transparent front “window”of the eye

Refracts light

A

Cornea

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12
Q

Layers of cornea

A
  1. Corneal epithelium
  2. Bowman’s layer
  3. Corneal Stroma
  4. Dua’slayer
  5. Descemet’smembrane
  6. Endothelium
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13
Q

-nonkeratinizedstratified squamousepithelium, regenerative ability

A

Corneal epithelium

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14
Q

collagen fibers

A

bowmans layer

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15
Q

strong layer, discovered in 2013

A

Dua’s layer

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16
Q

Composotion of corneal stroma

A

hick layer (90%) of regularly arranged collagen fibers (type 1), keratinocytes

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17
Q

thin acellularlayer that serves as the modified basement membrane of the endothelium, collage type IV

A

Descemet’s membrane

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18
Q

monolayer of cuboidalcells, not able to regenerate, responsible for the corne’sdeturgescence

A

Endothelium

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19
Q

The junction between cornea and sclera

A

Limbus

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20
Q

Anterior Chamber of Eye

A

Iris
Lens
CiliaryBody

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21
Q

The sclera May develop whitening as part of old age calles

A

Arcus senilis

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22
Q

Posterior chamber

A 
Vitreous Cavity
Retina
Macula
Choroid
Optic disc
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23
Q

The space between the cornea and iris
Contains a watery fluid called aqueous humor
Normally acellular

A

Aqueus humor

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24
Q

Angle formed by the inner cornea and iris roots

Comprised of several structures that make up the eye’s drainage

A

Anterior Chamber Angle

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25
The Eyes drinage system components
trabecularmeshwork | Schlemm’scanal
26
middle, vascular layer of the eye
Uveal tract
27
middle layer of eye
Iris Ciliarybody Choroid
28
contributes to the blood supply of the retina
Choroid
29
Colored part of the eye that controls the amount of light that enters the eye
iris
30
hole at the center of the iris that, size is controlled by the iris muscles
pupil
31
Accounts for the variety of eye colors seen | Dependent on the amount of pigment in the iris
Pigmented posterioir surface
32
COmposition of pimented posterioor surgace
Blood vessels, connective tissue, melanocytesand pigment cells
33
WHat muscles does the iris contain
dilator and sphincter muscles
34
Contraction of the sphincter muscle:
pupil constriction
35
pupil dilation
Contraction of the dilator muscles
36
Major circle of the iris
blood supply of iris
37
innervaton of iris
ciliarynerves
38
Circular opening at the center of the iris | Adjusts the amount of light entering the eye
pupil
39
2 determinants of pupillary size
constriction (parasympathetic activity –CN III) | dilation due to sympathetic activity
40
Structure of the eye that produces aqueous humor
CIliary body
41
Changes seen in contraction of ciliary body
Changes the tension of the zonularfibers suspending the lens | Change in tension leads to increased thickness of the lens allows eye to focus at near objects (accommodation)
42
Vascular, pigmented layer between the sclera(externally) and the retina (internally)
Choroid
43
Provides blood supply to the outer retinal layers
Choroid
44
Biconvex structure Refracts and focuses light on the retina Suspended in place by zonulefibers
Lens
45
What suspend the lens in place
zonule fibers
46
Size of Lens normally
Anteroposterior: 4.0 to 5.0 mm | Equatorial diameter: 9.0 to 10mm
47
narrow space behind the iris and in front of the zonulefibers Space anterior to the crystalline lens Filled with aqueous humor Normally acellular
Posterior chamber
48
Large space behind the lens | Extends up to the retina
Vitreous Cavity
49
transparent gel-like material
vitreous humor
50
Normal volume vitreous cavity can hold
4.5 cc in
51
True or flase: | The vitreous humor is rich in blood vessels, 98-99% water, collagen, glycosaminoglycanhyaluronicacids, proteins
FASLE: | devoid of blood vessels, 98-99% water, collagen, glycosaminoglycanhyaluronicacids, proteins
52
Thin, semitransparent, multilayer sheet of neural tissue lining the vitreous cavity
Retina
53
Layers of Retina from outer to inner
1. Retinal pigment epithelium 2. Photoreceptor 3. Outer limiting membrane 4. Outer nuclear layer 5. Outer plexiformlayer 6. Inner nuclear layer 7. Inner plexiformlayer 8. Ganglion cell layer 9. Retinal nerve fiber layer 10. Inner limiting membrane
54
Branch of the ophthalmic artery | supplies inner 1/3 of the retina
Central retinal artery
55
wHAT IS BEING SUPPLIED BY THE CHOROIDAL ARTERIES
Supplied by the ophthalmic artery | Supplies outer 2/3 of the retina
56
Area of the retina responsible for fine, central vision
mACULA
57
oval depression in the center of the macula Approximately 2 disc diameters away from the optic disc Slight inferior to the optic disc
Fovea
58
True or fasle: | The Optic nerve is not really a peripheral nerve, it is actually a direct extension of the CNS
TRUE
59
1.2 M axons 50 mm long Synapses at the lateral geniculatenucleus
Optic nerve
60
BS of optic nerve
Circle of zinn-haller
61
What does the Circle of Zinn-haller supply
Short PCA Choroidalcirculation Pialvasculature

Anatomy Module 8 (3 decks)

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