eye histology

Question 1

3 concentric layers of the eye?

Answer 1

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

Photoreceptive tunic:
- retina (inner)

Question 2

fibrous layer (outer) layer consists of..?

Answer 2

sclera & cornea

Question 3

vascular layer (middle) consists of..?

Answer 3

• choroid
• ciliary body
• iris

Question 4

retina consists of..?

Answer 4

• pigmented layer = outer layer
• neural layer = inner layer

Question 5

pigmented layer of retina contains..?

Answer 5

• no photoreceptors
• stores vitamin A

Question 6

neural layer of retina contains..?

Answer 6

• photoreceptors
• bipolar cells
• ganglion cells

Question 7

lamina choriocapillaris is what..?

Answer 7

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

Question 8

Bruch’s membrane is part of what?

Answer 8

innermost layer of choroid

Question 9

vitreous lamina aka?

Answer 9

Bruch’s membrane

Question 10

choroid is the X layer..?

Answer 10

vascular layer of the eye

Question 11

choroid contains?

Answer 11

connective tissues

Question 12

choroid lies btw. X & Y?

Answer 12

retina & sclera

Question 13

choroid layer of the eye func.?

Answer 13

• provides oxygen & nourishment to outer layers of the retina

Question 14

uveal tract components (3)

Answer 14

• ciliary body
• iris
• choroid

Question 15

4 layers of the choroid:

Answer 15

• Haller’s layer
• Sattler’s layer
• Choriocapillaris
• Bruch’s membrane

Question 16

optic N.

Answer 16

Question 17

fovea

Answer 17

Question 18

optic papilla

Answer 18

Question 19

dura mater of optic N.

Answer 19

Question 20

vitreous body

Answer 20

Question 21

sclera

Answer 21

Question 22

lens

Answer 22

Question 23

ora serrata is..?

Answer 23

serrated junction btwe. retina & ciliary body

Question 24

ora serrata

Answer 24

Question 25

ant. chamber

Answer 25

Question 26

post. chamber

Answer 26

Question 27

ciliary proc.

Answer 27

Question 28

ciliary proc 2

Answer 28

Question 29

ciliary musc.

Answer 29

Question 30

iris

Answer 30

Question 31

limbus

Answer 31

Question 32

Refractile media

Answer 32

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

Question 33

Cornea characteristics

Answer 33

- **NON**vascular - Colorless - Clear

Question 34

Layer of cornea

Answer 34

- Corneal epithelium - Bowman's membrane - Stroma - Descemet's membrane - Corneal endothelium

Question 35

Corneal epithelium

Answer 35

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

Question 36

Cornea

Answer 36

1. Epithelium 2. Stroma 3. Endothelium

Question 37

Cornea layers

Answer 37

Question 38

Cornea layers

Answer 38

Anterior --\> Posterior

Question 39

Sclera characteristics

Answer 39

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

Question 40

Sclera anteriorly covered by?

Answer 40

Bulbar conjunctiva.

Question 41

Choroid

Answer 41

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

Question 42

Lens components

Answer 42

- Lens capsule - Subcapsular epithelium - Fiber cells

Question 43

Lens capsule

Answer 43

- Basement membrane - Consists of type Iv collagen, glycoproteins, heparan sulfate proteoglycan

Question 44

Lens

Answer 44

Question 45

Photoreceptive tunic

Answer 45

Inner layer

Question 46

Posterior portion of retina is?

Answer 46

Photosensitive.

Question 47

Anterior portion of retina

Answer 47

Constitutes ciliary body and back part of iris

Question 48

10 layers of retina

Answer 48

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

Question 49

## Footnote Pigment epithelium

Answer 49

- Columnar cells - Bruch's membrane converts trans-retinol to retinal, important for rhodopsin synthesis

Question 50

Organ of corti

Answer 50

Question 51

Organ of corti histology

Answer 51

Question 52

layers of retina

Answer 52

Membrane (internal limiting) Nerve fibers Ganglions Inner plexiform Inner nuclear Outer plexiform Outer nuclear External limiting membrane Photoreceptors Retinal pigment epithelium **Mnemonic: My Nerves Get In Knots Outside Our Easy Practice Review**