ABO PRE-TEST CERTIFICATION SCRIPT Questions with Correct
Answers (Grade A+)
Question 1: When ordering a six inch temple, its corresponding millimeter value is which of the
following?
A. 135 mm
B. 140 mm
C. 145 mm
D. 150 mm
Answer: 150 mm.
Question 2: What is the focal length of a 2 diopter lens?
A. 500 cm
B. 39.37 inches
C. 500 mm
D. 2 meters
Answer: 500 mm.
Question 3: Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers
Answer: Nanometers.
Question 4: Which of the following has the shortest and therefore most harmful wavelength?
A. UVC
B. UVB
C. UVA
D. INFRARED
Answer: UVC.
Question 5: When two light wavesw are in "in phase" they willA. Destroy on anotherB. Reduce each
front by halfC. Compound one anotherD. None of the above
Answer: Compound one another.
Question 6: The cylinder axis tolerance for a 1.00D cylinder according to ANSI Z80.1 isA. Plus or
minus 7 degreesB. Plus or minus 5 degreesC. Plus or minus 3 degreesD. Plus or minus 2 degrees
Answer: Plus or minus 3 degrees.
Page 1
,Question 7: 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
Answer: Thicker temporally.
Question 8: A minus lens decentered "out" will result in a finished lens which isA. BalancedB. Thicker
temporallyC. Thicker nasallyD. Uniform in edge thickness
Answer: Thicker nasally.
Question 9: An uncoated normal plastic lens will reflect approximately ______% of light.
A. 2%
B. 4%
C. 8%
D. 12%
Answer: 8%.
Question 10: A lens having a minus curve on both front and back is calledA. ToricB. MeniscusC.
BiconvexD. Biconcave
Answer: Biconcave.
Question 11: 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
Answer: 50%.
Question 12: 80 degrees from the specified axis, a cylinder will showA. 5% of its powerB. 10% of its
powerC. 50% of its powerD. 97% of its power
Answer: 97% if its power.
Page 2
, Question 13: The type of patient often bothered by large magnified eye look is a
A. Myope
B. Persbyope
C. Hyperope
D. Emmetrope
Answer: Hyperope.
Question 14: A Box O graph is used to measure lenses for
A. Axis
B. Power
C. Thickness
D. Size
Answer: Size.
Question 15: A presbyopic electrician that works on overhead wiring would benefit most from
A. Executive bifocal
B. Near only readers
C. Double D
D. Round Segment
Answer: Double D.
Question 16: A presbyopic golfer, when addressing the ball, is troubled by the placement of this normal
bifocal. Which of the following would pose the best solution as a recreational golf glasses?
A. Executive bifocal fit 1mm lower than standard
B. Double D
C. Quadrifocal
D. Round segment rotated to the temporal side of the lens
Answer: Round segment rotated to the temporal side of the lens.
Question 17: Which of the following is NOT one of the 6 muscles responsible for the movement of the
eye?
A. Superior Rectus
B. Inferior Rectus
C. Internal Rotator
D. Inferior Oblique
Answer: Internal Rotator.
Question 18: The index of refraction of spectacle crown glass isA. 1.49B. 1.523C. 1.53D. 1.59
Answer: 1.523.
Page 3
Answers (Grade A+)
Question 1: When ordering a six inch temple, its corresponding millimeter value is which of the
following?
A. 135 mm
B. 140 mm
C. 145 mm
D. 150 mm
Answer: 150 mm.
Question 2: What is the focal length of a 2 diopter lens?
A. 500 cm
B. 39.37 inches
C. 500 mm
D. 2 meters
Answer: 500 mm.
Question 3: Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers
Answer: Nanometers.
Question 4: Which of the following has the shortest and therefore most harmful wavelength?
A. UVC
B. UVB
C. UVA
D. INFRARED
Answer: UVC.
Question 5: When two light wavesw are in "in phase" they willA. Destroy on anotherB. Reduce each
front by halfC. Compound one anotherD. None of the above
Answer: Compound one another.
Question 6: The cylinder axis tolerance for a 1.00D cylinder according to ANSI Z80.1 isA. Plus or
minus 7 degreesB. Plus or minus 5 degreesC. Plus or minus 3 degreesD. Plus or minus 2 degrees
Answer: Plus or minus 3 degrees.
Page 1
,Question 7: 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
Answer: Thicker temporally.
Question 8: A minus lens decentered "out" will result in a finished lens which isA. BalancedB. Thicker
temporallyC. Thicker nasallyD. Uniform in edge thickness
Answer: Thicker nasally.
Question 9: An uncoated normal plastic lens will reflect approximately ______% of light.
A. 2%
B. 4%
C. 8%
D. 12%
Answer: 8%.
Question 10: A lens having a minus curve on both front and back is calledA. ToricB. MeniscusC.
BiconvexD. Biconcave
Answer: Biconcave.
Question 11: 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
Answer: 50%.
Question 12: 80 degrees from the specified axis, a cylinder will showA. 5% of its powerB. 10% of its
powerC. 50% of its powerD. 97% of its power
Answer: 97% if its power.
Page 2
, Question 13: The type of patient often bothered by large magnified eye look is a
A. Myope
B. Persbyope
C. Hyperope
D. Emmetrope
Answer: Hyperope.
Question 14: A Box O graph is used to measure lenses for
A. Axis
B. Power
C. Thickness
D. Size
Answer: Size.
Question 15: A presbyopic electrician that works on overhead wiring would benefit most from
A. Executive bifocal
B. Near only readers
C. Double D
D. Round Segment
Answer: Double D.
Question 16: A presbyopic golfer, when addressing the ball, is troubled by the placement of this normal
bifocal. Which of the following would pose the best solution as a recreational golf glasses?
A. Executive bifocal fit 1mm lower than standard
B. Double D
C. Quadrifocal
D. Round segment rotated to the temporal side of the lens
Answer: Round segment rotated to the temporal side of the lens.
Question 17: Which of the following is NOT one of the 6 muscles responsible for the movement of the
eye?
A. Superior Rectus
B. Inferior Rectus
C. Internal Rotator
D. Inferior Oblique
Answer: Internal Rotator.
Question 18: The index of refraction of spectacle crown glass isA. 1.49B. 1.523C. 1.53D. 1.59
Answer: 1.523.
Page 3
