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eye histology Flashcards

1
Q

3 concentric layers of the eye?

A
  • fibrous layer (outer)
  • — Sclera
  • — Cornea
  • vascular layer (middle)
  • — Iris
  • — Ciliary body
  • — Choroid

Photoreceptive tunic:
- retina (inner)

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2
Q

fibrous layer (outer) layer consists of..?

A

sclera & cornea

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3
Q

vascular layer (middle) consists of..?

A
  • choroid
  • ciliary body
  • iris
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4
Q

retina consists of..?

A
  • pigmented layer = outer layer
  • neural layer = inner layer
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5
Q

pigmented layer of retina contains..?

A
  • no photoreceptors
  • stores vitamin A
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6
Q

neural layer of retina contains..?

A
  • photoreceptors
  • bipolar cells
  • ganglion cells
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7
Q

lamina choriocapillaris is what..?

A

layer of capillaries that is immediately adjacent to Bruch’s membrane in the choroid

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8
Q

Bruch’s membrane is part of what?

A

innermost layer of choroid

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9
Q

vitreous lamina aka?

A

Bruch’s membrane

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10
Q

choroid is the X layer..?

A

vascular layer of the eye

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11
Q

choroid contains?

A

connective tissues

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12
Q

choroid lies btw. X & Y?

A

retina & sclera

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13
Q

choroid layer of the eye func.?

A
  • provides oxygen & nourishment to outer layers of the retina
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14
Q

uveal tract components (3)

A
  • ciliary body
  • iris
  • choroid
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15
Q

4 layers of the choroid:

A
  • Haller’s layer
  • Sattler’s layer
  • Choriocapillaris
  • Bruch’s membrane
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16
Q

optic N.

A
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17
Q

fovea

A
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18
Q

optic papilla

A
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19
Q

dura mater of optic N.

A
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20
Q

vitreous body

A
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21
Q

sclera

A
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23
Q

ora serrata is..?

A

serrated junction btwe. retina & ciliary body

24
Q

ora serrata

25
Q

ant. chamber

26
Q

post. chamber

27
Q

ciliary proc.

28
Q

ciliary proc 2

29
Q

ciliary musc.

31
Q

limbus

32
Q

Refractile media

A
  • *- Cornea**
  • Anterior and posterior chambers which contain aqueous humor
  • *- Lens**
  • Vitreous space which contains vitreous humor
33
Q

Cornea characteristics

A
  • NONvascular
  • Colorless
  • Clear
34
Q

Layer of cornea

A
  • Corneal epithelium
  • Bowman’s membrane
  • Stroma
  • Descemet’s membrane
  • Corneal endothelium
35
Q

Corneal epithelium

A
  • Nonkeratinized stratified squamous epithelium
  • 5-6 cells thick
  • Continuous with bulbar conjunctival epithelium
    (1)
36
Q

Cornea

A
  1. Epithelium
  2. Stroma
  3. Endothelium
37
Q

Cornea layers

38
Q

Cornea layers

A

Anterior –> Posterior

39
Q

Sclera characteristics

A
  • Gray-white appearance
  • Optic nerve exits posteriorly at lamina cibrosa (sclera reduced to fenestrated membrane)
  • Site of attachment of rectus and oblique muscles
40
Q

Sclera anteriorly covered by?

A

Bulbar conjunctiva.

41
Q

Choroid

A
  • Highly vascularized
  • Loose CT rich in fibroblasts, macrophages, lymphocytes, mast cells, plasma cells, melanocytes
  • Elastic fibers b/w blood vessels
42
Q

Lens components

A
  • Lens capsule
  • Subcapsular epithelium
  • Fiber cells
43
Q

Lens capsule

A
  • Basement membrane
  • Consists of type Iv collagen, glycoproteins, heparan sulfate proteoglycan
45
Q

Photoreceptive tunic

A

Inner layer

46
Q

Posterior portion of retina is?

A

Photosensitive.

47
Q

Anterior portion of retina

A

Constitutes ciliary body and back part of iris

48
Q

10 layers of retina

A
  1. Pigment epithelium
  2. Photoreceptor layer
  3. Outer limiting membrane
  4. Outer nuclear layer
  5. Outer plexiform layer
  6. Inner nuclear layer
  7. Inner plexiform layer
  8. Ganglion cell layer
  9. Nerve fiber layer
  10. Inner limiting membrane
49
Q

Pigment epithelium

A
  • Columnar cells
  • Bruch’s membrane converts trans-retinol to retinal, important for rhodopsin synthesis
50
Q

Organ of corti

51
Q

Organ of corti histology

52
Q

layers of retina

A

Membrane (internal limiting)
Nerve fibers
Ganglions
Inner plexiform
Inner nuclear
Outer plexiform
Outer nuclear
External limiting membrane
Photoreceptors
Retinal pigment epithelium

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Head & neck (23 decks)

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