ABO Exam Pre-Test – Practice Questions &
Verified Answers | American Board of Opticianry
Certification Exam Review | 2026–2027
, 150 mm 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
500 mm What is the focal length of a 2 diopter lens?
A. 500 cm
B. 39.37 inches
C. 500 mm
D. 2 meters
Nanometers Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers
UVC Which of the following has the shortest and therefore most harmful wavelength?
A. UVC
B. UVB
C. UVA
D. INFRARED
Compound one another 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 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 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 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% An uncoated normal plastic lens will reflect approximately ______% of light.
A. 2%
B. 4%
C. 8%
D. 12%
Biconcave A lens having a minus curve on both front and back is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave
50% 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
Verified Answers | American Board of Opticianry
Certification Exam Review | 2026–2027
, 150 mm 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
500 mm What is the focal length of a 2 diopter lens?
A. 500 cm
B. 39.37 inches
C. 500 mm
D. 2 meters
Nanometers Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers
UVC Which of the following has the shortest and therefore most harmful wavelength?
A. UVC
B. UVB
C. UVA
D. INFRARED
Compound one another 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 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 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 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% An uncoated normal plastic lens will reflect approximately ______% of light.
A. 2%
B. 4%
C. 8%
D. 12%
Biconcave A lens having a minus curve on both front and back is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave
50% 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
