ABO ADVANCED PRACICE EXAM QUESTIONS
WITH CORRECT DETAILED ANSWERS
CURRENTLY TESTED AND VERIFIED
GRADED A+
The absorption of light in lenses is classified by two variables. What are they?
A. Base curve and thickness
B. Index of refraction and thickness
C. Thickness and lens transmission
D. Tint, and lens transmission --CORRECT ANSWER--C. Thickness and len
transmission
The denser the tint in a lens____
A. The greater transmission of light through the lens
B. The greater internal reflections in the lens
C. The less transmission of light through the lens
D. The fewer internal reflections in the lens --CORRECT ANSWER--C the less
transmission of light through the lens
UV filtering properties are inherent in which lens?
A. Cr-39
B. Polycarbonate
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,C. Trivex
D. B& c --CORRECT ANSWER--D. Poly and trivex
How much UV is absorbed by a clear crown glass lens?
A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--A. 9%
How much UV is absorbed by a gray #3 crown glass lens?
A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--82%
How much UV is absorbed by a clear CR-39 lens?
A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--55%
How much UV is absorbed by a tinted CR-39 lens?
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,A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--55%
A characteristic of a dark tinted glass lens with an RX of +4.00 sphere would
be?
A. Uniform density in color
B. Dark on the edge and lighter in the center
C. Dark in the center and lighter on the edge
D. Waves in the tint --CORRECT ANSWER--C. Dark in the center and lighter
on the edge
Given a high plus or high minus rx, which lens material would offer the best
choice for uniform density in a sun lens
A. Pigmented glass
B. Cr-39
C trivex
D b&c --CORRECT ANSWER--D. B&C
Although this may be the most popular color for sun lenses it is not
recommended for patients with emerging cataracts --CORRECT ANSWER--
Grey
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, _______ added to any color increases contrast --CORRECT ANSWER--Yellow
______ is better than ____ for improving contrast
A. Violet/gray
B. Green/gray
C. Gray/green
D. Gray/ violet --CORRECT ANSWER--B. Green/gray
Glare is of more concern to which wearer?
A. Red haired patient
B. Computer user
C. Cataract patient
D. Presbyope --CORRECT ANSWER--C. Cataract patient
________ are generally inorganic materials (metals or minerals) that are
vacuum deposited to add color on glass lenses to give a uniform density of color
on the lenses
A.vacuum color coatings
B. Deposit color coatings
C. Heavy color coatings
D. AR color coatings --CORRECT ANSWER--A vacuum color coatings
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WITH CORRECT DETAILED ANSWERS
CURRENTLY TESTED AND VERIFIED
GRADED A+
The absorption of light in lenses is classified by two variables. What are they?
A. Base curve and thickness
B. Index of refraction and thickness
C. Thickness and lens transmission
D. Tint, and lens transmission --CORRECT ANSWER--C. Thickness and len
transmission
The denser the tint in a lens____
A. The greater transmission of light through the lens
B. The greater internal reflections in the lens
C. The less transmission of light through the lens
D. The fewer internal reflections in the lens --CORRECT ANSWER--C the less
transmission of light through the lens
UV filtering properties are inherent in which lens?
A. Cr-39
B. Polycarbonate
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,C. Trivex
D. B& c --CORRECT ANSWER--D. Poly and trivex
How much UV is absorbed by a clear crown glass lens?
A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--A. 9%
How much UV is absorbed by a gray #3 crown glass lens?
A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--82%
How much UV is absorbed by a clear CR-39 lens?
A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--55%
How much UV is absorbed by a tinted CR-39 lens?
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,A. 9%
B. 18%
C. 55%
D. 82% --CORRECT ANSWER--55%
A characteristic of a dark tinted glass lens with an RX of +4.00 sphere would
be?
A. Uniform density in color
B. Dark on the edge and lighter in the center
C. Dark in the center and lighter on the edge
D. Waves in the tint --CORRECT ANSWER--C. Dark in the center and lighter
on the edge
Given a high plus or high minus rx, which lens material would offer the best
choice for uniform density in a sun lens
A. Pigmented glass
B. Cr-39
C trivex
D b&c --CORRECT ANSWER--D. B&C
Although this may be the most popular color for sun lenses it is not
recommended for patients with emerging cataracts --CORRECT ANSWER--
Grey
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, _______ added to any color increases contrast --CORRECT ANSWER--Yellow
______ is better than ____ for improving contrast
A. Violet/gray
B. Green/gray
C. Gray/green
D. Gray/ violet --CORRECT ANSWER--B. Green/gray
Glare is of more concern to which wearer?
A. Red haired patient
B. Computer user
C. Cataract patient
D. Presbyope --CORRECT ANSWER--C. Cataract patient
________ are generally inorganic materials (metals or minerals) that are
vacuum deposited to add color on glass lenses to give a uniform density of color
on the lenses
A.vacuum color coatings
B. Deposit color coatings
C. Heavy color coatings
D. AR color coatings --CORRECT ANSWER--A vacuum color coatings
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