Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CONTACT LENS (RNH) > TEST 5 > Flashcards

TEST 5 Flashcards

LAST TAKE: sept 1, 2021 FLUORINE: add oxygen permeability to polymer CAB (CELLULOSE ACETATE BUTYRATE): gives polymer oxygen permeability SOLUBILITY: additional mechanism by which oxygen permeates FLUORINE: makes polymer resistant to deposits

1
Q

CL Material: Derived from wood cellulous

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

A

c. CAB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

CL Material: the additional mechanism by which oxygen permeates

a. Diffusion
b. Fluorine
c. Solubility
d. Silicone Acrylate

A

c. Solubility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

CL Material: it makes the polymer resistant to deposits

a. Silicone
b. Fluorine
c. Fluorocarbon
d. Silicone Acrylate

A

b. Fluorine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

CL Material: In order to move through the voids in the material, oxygen relies on the

a. Diffusion
b. Dilution
c. Solution
d. None of the Above

A

a. Diffusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

CL Material: It gives rigidity to the GP lens

a. Acrylate
b. Fluorine
c. Silicone
d. Styrene

A

a. Acrylate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

CL Material: It gives the polymer oxygen permeability

a. Silicone
b. PMMA (polymethylmethacrylate)
c. CAB (Cellulose Acetate Butyrate)
d. FSA(Fluorosilicone acrylate)

A

c. CAB (Cellulose Acetate Butyrate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Nomenclature of Material Properties :In the oxygen transmissibility Dk/L, ā€œLā€ represents

a. Solubility
b. Flexibility
c. Permeability
d. Thickness

A

d. Thickness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Nomenclature of Material Properties :In the coefficient variable Dk, k represents

a. Solvency
b. Salinity
c. Solubility
d. Softness

A

c. Solubility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Nomenclature of Material Properties : This refers to the adherence of a liquid to the surface of the solid

a. Oxygen Permeability
b. Wettability
c. Oxygen Transmisability

A

b. Wettability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Nomenclature of Material Properties : This refers to the property of polymeric material to transmit oxygen

a. Oxygen Permeability
b. Wettability
c. Oxygen Transmisability

A

a. Oxygen Permeability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Generally, CL ideal material should be amendable to easy shaping

a. Wettability
b. Stable
c. Sterility
d. Moulding

A

d. Moulding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Nomenclature of Material Properties :In thick CL, oxygen transmissibility is

a. Reduced
b. Increased
c. Blocked
d. Absorbed

A

a. Reduced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Generally, CL ideal material should be

a. Non-permeable
b. Transmissible
c. Permeable
d. Non-transmissible

A

c. Permeable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Nomenclature of Material Properties : This refers total oxygen transmissibility of the lens is denoted by

a. Dk/t
b. Dk/f
c. Dk/s
d. Dk/ny

A

a. Dk/t

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

CL Material: First commercially available plastic contact Lens Material

a. Silicone
b. PMMA (polymethylmethacrylate)
c. CAB (Cellulose Acetate Butyrate)
d. FSA(Fluorosilicone acrylate)

A

b. PMMA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Generally, CL ideal material should have a good surface chemistry:

a. Wettability
b. Stable
c. Sterility
d. Moulding

A

b. Stable

17
Q

Generally, CL ideal material should be ________ in all diemension

a. Wettability
b. Stable
c. Sterility
d. Moulding

A

b. Stable

18
Q

Generally, CL ideal material should be resistant to contamination

a. Wettability
b. Stable
c. Sterility
d. Moulding

A

c. Sterility

19
Q 
CL Material: The first choice materials for
many practitiooners
a. Silicone
b. PMMA (polymethylmethacrylate)
c. CAB (Cellulose Acetate Butyrate)
d. FSA(Fluorosilicone acrylate)
A

d. FSA(Fluorosilicone acrylate)

20
Q

Nomenclature of Material Properties :In surface chemistry, low wetting angle means

a. Low Transmissibility
b. High Transmissibility
c. Poor wettability
d. Good wettability

A

d. Good wettability

21
Q

Generally, CL ideal material should be

a. Transparent
b. Opaque
c. Transluscent
d. None of the above

A

a. Transparent

22
Q

CL Material: CL material composed of fluorine and MMA to create a polyperfluoroether

a. Silicone
b. Fluorine
c. Fluorocarbon
d. Silicone Acrylate

A

c. Fluorocarbon

23
Q

Nomenclature of Material Properties :In thin CL, oxygen transmissibility is

a. Reduced
b. Increased
c. Blocked
d. Absorbed

A

b. Increased

24
Q

CL Material: it adds oxygen permeability to a polymer

a. Silicone
b. Fluorine
c. Styrene
d. Silicone Acrylate

A

b. Fluorine

25
Q

CL Materials: Below are the list of early materials use in GP lenses EXCEPT for

a. CAB (Cellulose Acetate Butyrate)
b. Silicone
c. FSA (Fluorosilicone acrylate)
d. Styrene

A

c. FSA (Fluorosilicone acrylate)

26
Q

Nomenclature of Material Properties :In the coefficient variable Dk, D represents

a. Diffusion
b. Difficulty
c. Dilution
d. Discussion

A

a. Diffusion

27
Q

CL Material: these are copolymers in varying proportions of PMMA and silicone

a. Silicone
b. Fluorine
c. Fluorocarbon
d. Silicone Acrylate

A

d. Silicone Acrylate

28
Q

Generally, CL ideal material should be

a. Non-Biocompatible
b. Biocompatible
c. Biodegradable
d. Non-Biodegradeable

A

b. Biocompatible

29
Q

CL Materials: FSA stands for

a. Fluorosilicone Acrylates
b. Fluorostyrene Acrylates
c. Fluorocarbon Acetate
d. Fluorocarbon Acrylates

A

a. Fluorosilicone Acrylates

CONTACT LENS (RNH) (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions