ABO PRACTICE UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
◉ 500 mm.
Answer: What is the focal length of a 2 diopter lens?
A. 500 cm
B. 39.37 inches
C. 500 mm
D. 2 meters
◉ Nanometers.
Answer: Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers
◉ UVC.
Answer: Which of the following has the shortest and therefore most
harmful wavelength?
A. UVC
,B. UVB
C. UVA
D. INFRARED
◉ Compound one another.
Answer: When two light wavesw are in "in phase" they will
A. Destroy on another
B. Reduce each front by half
C. Compound one another
D. None of the above
◉ Plus or minus 3 degrees.
Answer: The cylinder axis tolerance for a 1.00D cylinder according
to ANSI Z80.1 is
A. Plus or minus 7 degrees
B. Plus or minus 5 degrees
C. Plus or minus 3 degrees
D. Plus or minus 2 degrees
◉ Thicker temporally.
Answer: A plus lens decentered "out" will result in a finished lens
which is
,A. Balanced
B. Thicker temporally
C. Thicker nasally
D. Uniform in edge thickness
◉ Thicker nasally.
Answer: A minus lens decentered "out" will result in a finished lens
which is
A. Balanced
B. Thicker temporally
C. Thicker nasally
D. Uniform in edge thickness
◉ 8%.
Answer: An uncoated normal plastic lens will reflect approximately
______% of light.
A. 2%
B. 4%
C. 8%
D. 12%
◉ Biconcave.
, Answer: A lens having a minus curve on both front and back is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave
◉ 50%.
Answer: Give the RX +1.00 +1.00 x 45, how much of the +1.00
cylinder is in the effect at axis 90?
A. 100%
B. 70%
C. 50%
D. 0
◉ 97% if its power.
Answer: 80 degrees from the specified axis, a cylinder will show
A. 5% of its power
B. 10% of its power
C. 50% of its power
D. 97% of its power
◉ Hyperope.
AND CORRECT ANSWERS
◉ 500 mm.
Answer: What is the focal length of a 2 diopter lens?
A. 500 cm
B. 39.37 inches
C. 500 mm
D. 2 meters
◉ Nanometers.
Answer: Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers
◉ UVC.
Answer: Which of the following has the shortest and therefore most
harmful wavelength?
A. UVC
,B. UVB
C. UVA
D. INFRARED
◉ Compound one another.
Answer: When two light wavesw are in "in phase" they will
A. Destroy on another
B. Reduce each front by half
C. Compound one another
D. None of the above
◉ Plus or minus 3 degrees.
Answer: The cylinder axis tolerance for a 1.00D cylinder according
to ANSI Z80.1 is
A. Plus or minus 7 degrees
B. Plus or minus 5 degrees
C. Plus or minus 3 degrees
D. Plus or minus 2 degrees
◉ Thicker temporally.
Answer: A plus lens decentered "out" will result in a finished lens
which is
,A. Balanced
B. Thicker temporally
C. Thicker nasally
D. Uniform in edge thickness
◉ Thicker nasally.
Answer: A minus lens decentered "out" will result in a finished lens
which is
A. Balanced
B. Thicker temporally
C. Thicker nasally
D. Uniform in edge thickness
◉ 8%.
Answer: An uncoated normal plastic lens will reflect approximately
______% of light.
A. 2%
B. 4%
C. 8%
D. 12%
◉ Biconcave.
, Answer: A lens having a minus curve on both front and back is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave
◉ 50%.
Answer: Give the RX +1.00 +1.00 x 45, how much of the +1.00
cylinder is in the effect at axis 90?
A. 100%
B. 70%
C. 50%
D. 0
◉ 97% if its power.
Answer: 80 degrees from the specified axis, a cylinder will show
A. 5% of its power
B. 10% of its power
C. 50% of its power
D. 97% of its power
◉ Hyperope.
