ABO PRACTICAL MARKING SCHEME EXAM DRILL Q&A COMPLETE QUESTIONS AND ANSWERS 2026 PERFECT GRADE RECORD.

ABO MARKING SCHEME EXAM DRILL
Q&A 2026 APPROVED HI-MARK.

⩥ 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