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 - 150 mm
What is the focal length of a 2 diopter lens?
A. 500 cm
B. 39.37 inches
C. 500 mm
D. 2 meters - 500 mm
Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers - Nanometers
Which of the following has the shortest and therefore most harmful wavelength?
A. UVC
B. UVB
C. UVA
D. INFRARED - UVC
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 - Compound one another
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 - Plus or minus 3 degrees
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 temporally
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 - Thicker nasally
An uncoated normal plastic lens will reflect approximately ______% of light.
A. 2%
B. 4%
C. 8%
D. 12% - 8%
A lens having a minus curve on both front and back is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave - Biconcave
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 - 50%
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 - 97% if its power
The type of patient often bothered by large magnified eye look is a
A. Myope
B. Persbyope
C. Hyperope
D. Emmetrope - Hyperope
A Box O graph is used to measure lenses for
A. Axis
B. Power
C. Thickness
D. Size - Size
A presbyopic electrician that works on overhead wiring would benefit most from
A. Executive bifocal
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