Quiz 4

Question 1

A patient has previously been unable to wear contact lenses due to corneal Hypoxia and excessive lens deposits, which of the following lens materials would be used to alleviate these problems?

a. FSA
b. PMMA
c. Silicone Acrylate
d. CAB

Answer 1

a. FSA

Question 2

What material would be used for someone interested in intermittent wear?

a. PMMA
b. FSA
c. HEMA
d. CAB

Answer 2

c. HEMA

Question 3

In cases of high degrees of corneal astigmatism, which type of Rigid lens probably would result in the best fit?

a. Bitoric
b. Prismatic
c. Bifocal
d. Spherical

Answer 3

a. Bitoric

Question 4

The first soft contact lenses were made using the ____ ?

a. Soft Molded
b. Spin Cast
c. Lathe Cut
d. Cast Molded

Answer 4

b. Spin Cast

Question 5

The “DK” value of a contact lens material indicates it’s :

a. Dimensional Stability
b. Permeability
c. Wetability
d. Transmissibilty

Answer 5

b. Permeability

Question 6

The best lens for a moderate dry eye patient is a:

a. Low Wetting Angle RGP
b. Low DK RGP
c. High DK RGP
d. High Wetting Angle RGP

Answer 6

a. Low Wetting Angle RGP

Question 7

The DK value of a lens represents it’s _____ ?

a. Transmissibility
b. Wettability
c. Durability
d. Permeability

Answer 7

d. Permeability

Question 8

The ability of a fluid to spread across the surface of a Rigid Lens is indicated by the ____ ?

a. Rockwell Rating
b. Flow Rate
c. EOP
d. Wetting Angle

Answer 8

d. Wetting Angle

Question 9

Which of the following materials would be representative of a soft lens?

a. Silicone
b. Glass
c. Polymethymethacrylate
d. Hydroxyethylmethacrylate

Answer 9

d. Hydroxyethylmethacrylate

Question 10

Given the following conditions what type of lens will best fill the patients needs?

Rx -1.50 SPH OU

Lens Use: Patient wants lenses for Tennis, Basketball and evening wear only

a. HEMA
b. CAB
c. Silicone Acrylate
d. PMMA

Answer 10

a. HEMA