ABO / NAO EXAM PRE-TEST QUESTIONS AND
ANSWERS 100% PASS
1. What is the conversion from inches to meters?: one meter equals
approximate 40 inches
2. 20 feet is equivalent to how many meters: 6
What measuring device is used to accurately measure A
3.
and B measurements of a finished lens or pattern: box - o -
graph
4. What is the lens power in the 90th meridian for this lens
prescription?
+3.00+1.00x180: +4.00
5.A lens prescription of -2.25 D is made on a +6.00 base
curve. The curve ground into the ocular surface would be what?:
the nominal power of a lens is the sum of its front and back surfaces -8.2
What should you do when a customer complains of severe
6.
eye pain?: tell them to call a dr.
7. 60 degrees from the axis a cylinder will show what
percent of its power?: 75%
If your lensmeter reads -.25 with no lens, a lens that
8.
measures -3.00 -1.50 x 180 is actually:: -2.75 -1.50 x 180
1/4
ANSWERS 100% PASS
1. What is the conversion from inches to meters?: one meter equals
approximate 40 inches
2. 20 feet is equivalent to how many meters: 6
What measuring device is used to accurately measure A
3.
and B measurements of a finished lens or pattern: box - o -
graph
4. What is the lens power in the 90th meridian for this lens
prescription?
+3.00+1.00x180: +4.00
5.A lens prescription of -2.25 D is made on a +6.00 base
curve. The curve ground into the ocular surface would be what?:
the nominal power of a lens is the sum of its front and back surfaces -8.2
What should you do when a customer complains of severe
6.
eye pain?: tell them to call a dr.
7. 60 degrees from the axis a cylinder will show what
percent of its power?: 75%
If your lensmeter reads -.25 with no lens, a lens that
8.
measures -3.00 -1.50 x 180 is actually:: -2.75 -1.50 x 180
1/4
