Cornea

Front 1

Repairs quickly from trauma

Damaged surface cells will regenerate within 24 to 48 hours

Entire cornea repairs in 7 days with no future tramua

Back 1

Epithelium

Front 2

Surface cells migrate to fill damaged area and more internal cells forward

Back 2

Epithelium

Front 3

Cells hold together with Cement like substance

Back 3

Epithelium

Front 4

5 to 7 layers thick

3 types of cells

Back 4

Epithelium

Front 5

Epithelium has 3 types of cells Inner, Middle, Outter.

What is the inner cell made of

Back 5

Tightly packed columnar cells/ basal cells which attach to basement membrane aka Bowman’s layer

Front 6

Epithelium has 3 types of cells Inner, Middle, Outter.

What is the middle cell made of

Back 6

Slightly columnar cells becoming wing cells

Front 7

Epithelium has 3 types of cells Inner, Middle, Outter.

What is the Outter cell made of

Back 7

Superficial squamous cells/flat overlapping cells

Front 8

Derives Nutrition primarily from Air and tear film

Back 8

Epithelium

Front 9

Epitheliums Primary function

Two defintions

Back 9

Protection from internal structures

Stabilization of the preocular tear film and maintaining a barrier to fluid and microorganisms.

Front 10

Sheet of transparent tissue/

10mm thick

Back 10

Bowman’s layer

Front 11

Sheet of transparent tissue/

10mm thick

Back 11

Bowman’s layer

Front 12

Provides Barrier to most Molecules

Back 12

Bowman’s Layer

Front 13

Sheet of transparent tissue/

10mm thick

Back 13

Bowman’s layer

Front 14

Provides Barrier to most Molecules

Back 14

Bowman’s Layer

Front 15

Damage will produce fibrous scar tissue

Back 15

Bowman’s Layer

Front 16

Extremely Tough

Back 16

Bowman’s layer

Front 17

90% of total thickness of Cornea and consists of finely layered collagen fibrils 30 um in diameter

Back 17

Stroma

Front 18

Absence of blood vessels contributes to its transparency

Back 18

Stroma

Front 19

Dependent upon proper hydration

Back 19

Stroma

Front 20

Collecting additional fluids will interrupt the regular structure and produce edema and clouding of the tissue

Back 20

Stroma

Front 21

6% or greater edema will greatly reduce transparency creating posterior striae

Back 21

Stroma

Front 22

I’m greater swelling of 10% or more posterior folds are produced

Back 22

Stroma

Front 23

Nutrition is primarily through diffusion through the endothelium from the aqueous humor

Back 23

Stroma

Front 24

Both proper fluid balance and nutrition can be influenced by the contact wearer

Back 24

Stroma

Front 25

Ulcers produced by bacterial, viral, or fungal infections or involving deep layers may take months to heal.

Back 25

Stroma

Front 26

Ulcers produced by bacterial, viral, or fungal infections or involving deep layers may take months to heal.

Back 26

Stroma

Front 27

Stacked lamellae extending from limbus to limbus running parallel to the surface and to each other.

Back 27

Stroma

Front 28

Loosely attached by short fibrils from the stroma

Back 28

Descendent’s Membrane

Front 29

Loosely attached by short fibrils from the stroma

Back 29

Descemet’s Membrane

Front 30

True Basement Membrane

Back 30

Descement’s Membrane

Front 31

Resistant to penetration

Back 31

Descement’s Membrane

Front 32

Trauma, intraocular surgery, inflammation of poorly fitting contacts may cause temporary folds to develop

Back 32

Descement’s Membrane

Front 33

It will retain the shape of the storms when changes (occur due to edema or other causes of corneal shape alteration causes striae)

Back 33

December’s Membrane

Front 34

Posterior limiting layer that is 8- thick

Back 34

Descemet’s membrane

Front 35

Most interior layer

Back 35

Endothelium

Front 36

20 mm wide

Located at the posterior of the cornea

Back 36

Endothelium

Front 37

Comprised of a single layer

Back 37

Endothelium

Front 38

Mostly hexagonally shaped cells about 4 to 6 mm thick

Back 38

Endothelium

Front 39

It forms a barrier between the aqueous humor and corneal stroma

Back 39

Endothelium

Front 40

We are born with these cells 400,000 none are developed through life

Back 40

Endothelium

Front 41

Primary function to maintain corneal transparency by removing excess fluids from the corneal interior by acting as a metabolic pump

Back 41

Endothelium

Front 42

Removing waste from the stroma and maintaining the relative deturgescence (dryness) of the cornea

Back 42

Endothelium

Front 43

If not working properly water will migrate into cornea, corneal clouding will develop, causing blurred vision. It may develop to the point where the surface forms blisters that intermittently rupture; causing sharp pain.

Back 43

Endothelium