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
CL Material: Derived from wood cellulous
a. Silicone
b. PMMA
c. CAB
d. FSA
c. CAB
CL Material: the additional mechanism by which oxygen permeates
a. Diffusion
b. Fluorine
c. Solubility
d. Silicone Acrylate
c. Solubility
CL Material: it makes the polymer resistant to deposits
a. Silicone
b. Fluorine
c. Fluorocarbon
d. Silicone Acrylate
b. Fluorine
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. Diffusion
CL Material: It gives rigidity to the GP lens
a. Acrylate
b. Fluorine
c. Silicone
d. Styrene
a. Acrylate
CL Material: It gives the polymer oxygen permeability
a. Silicone
b. PMMA (polymethylmethacrylate)
c. CAB (Cellulose Acetate Butyrate)
d. FSA(Fluorosilicone acrylate)
c. CAB (Cellulose Acetate Butyrate)
Nomenclature of Material Properties :In the oxygen transmissibility Dk/L, āLā represents
a. Solubility
b. Flexibility
c. Permeability
d. Thickness
d. Thickness
Nomenclature of Material Properties :In the coefficient variable Dk, k represents
a. Solvency
b. Salinity
c. Solubility
d. Softness
c. Solubility
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
b. Wettability
Nomenclature of Material Properties : This refers to the property of polymeric material to transmit oxygen
a. Oxygen Permeability
b. Wettability
c. Oxygen Transmisability
a. Oxygen Permeability
Generally, CL ideal material should be amendable to easy shaping
a. Wettability
b. Stable
c. Sterility
d. Moulding
d. Moulding
Nomenclature of Material Properties :In thick CL, oxygen transmissibility is
a. Reduced
b. Increased
c. Blocked
d. Absorbed
a. Reduced
Generally, CL ideal material should be
a. Non-permeable
b. Transmissible
c. Permeable
d. Non-transmissible
c. Permeable
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. Dk/t
CL Material: First commercially available plastic contact Lens Material
a. Silicone
b. PMMA (polymethylmethacrylate)
c. CAB (Cellulose Acetate Butyrate)
d. FSA(Fluorosilicone acrylate)
b. PMMA
Generally, CL ideal material should have a good surface chemistry:
a. Wettability
b. Stable
c. Sterility
d. Moulding
b. Stable
Generally, CL ideal material should be ________ in all diemension
a. Wettability
b. Stable
c. Sterility
d. Moulding
b. Stable
Generally, CL ideal material should be resistant to contamination
a. Wettability
b. Stable
c. Sterility
d. Moulding
c. Sterility
CL Material: The first choice materials for many practitiooners a. Silicone b. PMMA (polymethylmethacrylate) c. CAB (Cellulose Acetate Butyrate) d. FSA(Fluorosilicone acrylate)
d. FSA(Fluorosilicone acrylate)
Nomenclature of Material Properties :In surface chemistry, low wetting angle means
a. Low Transmissibility
b. High Transmissibility
c. Poor wettability
d. Good wettability
d. Good wettability
Generally, CL ideal material should be
a. Transparent
b. Opaque
c. Transluscent
d. None of the above
a. Transparent
CL Material: CL material composed of fluorine and MMA to create a polyperfluoroether
a. Silicone
b. Fluorine
c. Fluorocarbon
d. Silicone Acrylate
c. Fluorocarbon
Nomenclature of Material Properties :In thin CL, oxygen transmissibility is
a. Reduced
b. Increased
c. Blocked
d. Absorbed
b. Increased
CL Material: it adds oxygen permeability to a polymer
a. Silicone
b. Fluorine
c. Styrene
d. Silicone Acrylate
b. Fluorine
