OcPhysioT2_corn_aqueous

Question 1

How is the angle determined under the Maurice Lattice Theory?

Answer 1

Ratio of the spacing of the scattering elements to the wavelength of the light.

Question 2

What is needed for a zero order to occur?

Answer 2

The spacing is less than 1/2 the wavelength

Question 3

Does an exact measurement of spacing is required for transparency?

Answer 3

Nope.

Question 4

Where is the majority of keratocytes located?

Answer 4

In the anterior part of the cornea.

Question 5

What are the functions of keratocytes?

Answer 5

IIMRW
Intracorneal comm
Interlamellar tethering
Matrix turnover
Reservoir for glycogen
Wound healing by new matrix

Question 6

What are the functions of proteoglycans?

Answer 6

Provide tissue volume
Maintain spatial order of collagen fibrils
Resist compressive forces
Give viscoelstic properties to the tissue
Regulating collagen fibril assembly.

Question 7

Core proteins of proteoglycan attach to….

GAGs extend into….

Answer 7

Collagen fibrils

Interfibrillar space

Question 8

Are GAGs positively or negatively charged?

Answer 8

Negatively

Question 9

What kind of structure does GAGs form with each other?

Answer 9

Dumbbell-like structure.

Question 10

Is there more dermatan in the front or back part of stroma?

Answer 10

Front

Question 11

Does dermatan like oxygen rich or oxygen poor environments?

Answer 11

Oxy rich

Question 12

Explain to me Dermatan’s take on water?

Answer 12

MOre efficient at holding water.

Absorbs less water than Keratin.

Question 13

Does scattering occur a whole lot in the cornea?

Answer 13

No,

Because cornea is thin.

Question 14

What happens if scattering is increased in the cornea?

Answer 14

Loss of transparency

Question 15

How does light scatter mas in the cornea?

Answer 15

Imbalance b/w fibrils, keratocytes, or extrafibrillar matrix

Question 16

Does the Limbal blood vessels supply the cornea with a lot of oxygen?

Answer 16

Nope.

Very minimal.

Question 17

Who supplies the endothelium with oxygen?

Answer 17

The aqueous.

Question 18

WHere does the stroma receive its supply of oxygen?

Answer 18

From the aqueous and tears.

Question 19

Why is oxygen able to diffuse towards the cornea from the aqueous and the tear layer?

Answer 19

Because oxygen tension in the cornea is lower than both tears and aqueous.

Question 20

Why can’t the epithelium receive oxygen from the aqueous?

Answer 20

There are hoggers out there.

The endothelium and keratocytes of the stroma consume the oxygen first.

Question 21

How does the endothelium maintain corneal thickness?

Answer 21

By pumping bicarbonate into the anterior chamber.