ABO PRACTICE COMPREHENSIVE EXAM
QUESTIONS AND SOLUTIONS
◉ Not possible.
Answer: If the RX is +2.00 -4.00 x45, it would be necessary to
decenter the lens ______ to create 1 diapter of base out prism.
A. 2mm
B. 4mm
C. 6mm
D. Not possible
◉ Silver halide.
Answer: The element in photogray lenses that is responsible for the
lightening and darkening reaction is
A. Silver nitrade
B. Ferrous oxide
C. Silver halide
D. Flint
◉ Anti-reflective coating.
Answer: Which of the following would provide the greatest benefit
to a night driver?
,A. Polaroid
B. Blue Blocker
C. Anti-reflective coating
D. Polycarbonate
◉ Base up prismatic effect.
Answer: A minus lens moved downward from the primary position
will result in
A. Base up prismatic effect
B. Base down prismatic effect
C. Base in prismatic effect
D. Base out prismatic effect
◉ -9.50.
Answer: A patient refracted at 15mm is prescribed a -10.00 shpere.
The dispenser finds that the actual fitting distance will be at 10mm.
What should the compensated lens power be?
A. -9.50
B. -9.75
C. -10.75
D. -10.50
, ◉ 1.8 diapters base in.
Answer: A lens which reads +3.00 -2.00 x180 is decentered in 6mm
too much. How much horizontal prism is created by this error.
A. 1.8 diapters base in
B. 1.8 diapters base out
C. .6 diapters base in
D. .6 diapters base out
◉ 4 diapters of prism base in.
Answer: If a pair of lenses are gound with diapters of base in prism
in each lens, the patient will experience
A. 4 diapters of prism base in
B. 2 diapters of prism base out
C. No prism
D. None of the above
◉ One diapter.
Answer: Given a lens with a focal length of 1000mm / determine the
power of the lens.
A. One diapter
B. Five diapters
C. Ten diapters
QUESTIONS AND SOLUTIONS
◉ Not possible.
Answer: If the RX is +2.00 -4.00 x45, it would be necessary to
decenter the lens ______ to create 1 diapter of base out prism.
A. 2mm
B. 4mm
C. 6mm
D. Not possible
◉ Silver halide.
Answer: The element in photogray lenses that is responsible for the
lightening and darkening reaction is
A. Silver nitrade
B. Ferrous oxide
C. Silver halide
D. Flint
◉ Anti-reflective coating.
Answer: Which of the following would provide the greatest benefit
to a night driver?
,A. Polaroid
B. Blue Blocker
C. Anti-reflective coating
D. Polycarbonate
◉ Base up prismatic effect.
Answer: A minus lens moved downward from the primary position
will result in
A. Base up prismatic effect
B. Base down prismatic effect
C. Base in prismatic effect
D. Base out prismatic effect
◉ -9.50.
Answer: A patient refracted at 15mm is prescribed a -10.00 shpere.
The dispenser finds that the actual fitting distance will be at 10mm.
What should the compensated lens power be?
A. -9.50
B. -9.75
C. -10.75
D. -10.50
, ◉ 1.8 diapters base in.
Answer: A lens which reads +3.00 -2.00 x180 is decentered in 6mm
too much. How much horizontal prism is created by this error.
A. 1.8 diapters base in
B. 1.8 diapters base out
C. .6 diapters base in
D. .6 diapters base out
◉ 4 diapters of prism base in.
Answer: If a pair of lenses are gound with diapters of base in prism
in each lens, the patient will experience
A. 4 diapters of prism base in
B. 2 diapters of prism base out
C. No prism
D. None of the above
◉ One diapter.
Answer: Given a lens with a focal length of 1000mm / determine the
power of the lens.
A. One diapter
B. Five diapters
C. Ten diapters
