Vitreous

Question 1

What wavelength of UV light does the vitreous filter?

Answer 1

300-350 nm, in order to protect the retina

Question 2

What is the primary composition of the vitreous?

Answer 2

Approximately 99% H2O, type II collagen fibrils, and hyaluronic acid

Question 3

What role does hyaluronic acid play in the vitreous?

Answer 3

Provides support to collagen fibers, maintains proper collagen fibril spacing, and maintains viscosity

Question 4

How does the concentration of Vitamin C in the vitreous compare to blood plasma?

Answer 4

As high as 40X greater than in blood plasma

Question 5

What is the function of Vitamin C in the vitreous?

Answer 5

Buffers O2, reduces oxidative stress, and protects the retina from free radicals

Question 6

What happens to wavelengths below 300 nm?

Answer 6

They are absorbed by the cornea

Question 7

What happens to wavelengths between 300 and 400 nm?

Answer 7

They are absorbed by the lens

Question 8

What happens to wavelengths above 400 nm?

Answer 8

They are transmitted to the retina

Question 9

What is the primary metabolic function of the vitreous?

Answer 9

Acts as a metabolic buffer and storage area for the retina and lens

Question 10

True or False: The vitreous has significant metabolic activity.

Answer 10

False

Question 11

What is the approximate volume of the vitreous?

Answer 11

4 mL, making it about 80% of the total volume of the eye (5mL)