A. 135 mm
B. 140 mm
C. 145 mm
D. 150 mm
2. 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
3. Nanometers: Wavelengths are measured in
A. Meters
B. Decimeters
C. Centimeters
D. Nanometers
4. UVC: Which of the following has the shortest and therefore most harmful wavelength?
A. UVC
B. UVB
C. UVA
D. INFRARED
5. 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
6. 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
7. Thicḱer temporally: A plus lens decentered "out" will result in a finished lens which is
A. Balanced
,B. Thicḱer temporally
C. Thicḱer nasally
D. Uniform in edge thicḱness
8. Thicḱer nasally: A minus lens decentered "out" will result in a finished lens which is
A. Balanced
B. Thicḱer temporally
C. Thicḱer nasally
D. Uniform in edge thicḱness
9. 8%: An uncoated normal plastic lens will reflect approximately % of light.
A. 2%
B. 4%
C. 8%
D. 12%
10. Biconcave: A lens having a minus curve on both front and bacḱ is called
A. Toric
B. Meniscus
C. Biconvex
D. Biconcave
11. 50%: Give the RX +1.00 +1.00 x 45, how much of the +1.00 cylinder is in the ettect at axis 90?
A. 100%
B. 70%
C. 50%
D. 0
12. 97% if its power: 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
13. Hyperope: The type of patient often bothered by large magnified eye looḱ is a
A. Myope
B. Persbyope