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ABO EXAM PRE-TEST GRADED A+
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ABO EXAM PRE-TEST GRADED A+
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ABO EXAM PRE-TEST GRADED A+-.75 -.50 x 120 - ANSWER-The patient's RX is -1.75 -.50 x 120 with a +2.00 add
standard trifocal. What is the power through the intermediate.
A. -1.25 -.50 x 120
B. -.75 -.50 x 120
C. -.75 -.50 x 30
D. -1.00 -.50 x 150
-0.50 - ANSWER-The spherical equivalent of the lens +1.00 -3.00 x90 is
A. +0.50
B. -0.50
C. +1.25
D. -1.25
-0.50 -2.50 x115 - ANSWER-Which RX of the following is the same as the following RX:
-3.00 +2.50 x25
A. -3.00 +2.50 x105
B. -0.50 -2.50 x115
C. +0.50 +2.50 x115
D. +3.00 -0.50 x105
-2.00 -1.00 x90 - ANSWER-The optician has just neutralized an unknow power lens with
test lenses. The test lens used to neutralize the power in the vertical is a plus 2.0 and
the test lens used to neutralize the power in the horizontal is a plus 3.00. What is the
RX?
-2.00 +0.50 x180
-2.00 -1.00 x 90
-1.50 -0.50 x 180
+1.00 +0.50 x180
-3.25 -1.50 x180 - ANSWER-If your lensometer reads +0.25 with no lens, a lens that
measures -3.00 -1.50 x180 is actually
A. -2.75 -1.25 x180
B. -2.75 -1.50 x180
C. -3.25 -1.75 x180
D. -3.25 -1.50 x180
-9.50 - ANSWER-A patient refracted at 15mm is prescribed a -10.00 shpere. The
dispenser finds that the actual fitting distance will be at 10mm. What should the
compensated lens power be?
A. -9.50
B. -9.75
C. -10.75
D. -10.50
, +1.00 -1.25 - ANSWER-In neutralizing a lens of unknown power your first reading is
+1.00 and the next reading that focuses the cylinder target is -0.25.
What is the RX?
A. +1.00 -0.25
B. -0.25 +2.00
C. +1.00 -1.25
D. +0.25 +2.25
+1.75 -.25 x90 - ANSWER-What would the reading RX be if the following distance RX
and bifocal addition are given:
A. +.50 -.25 x90
B. +1.75 -.25 x90
C. +2.75 -.25 x90
D. +1.25 -.25 x90
+2.00 -2.00 x90 - ANSWER-Which of the following has no power in the 180 degree
median?
A. +2.00 -2.00 x90
B. +2.00 +2.00 x180
C. +1.00 +1.00 x135
D. +1.00 -2.00 x45
+2.50 - ANSWER-If the RX is OS +1.00 +3.00 x45, what would be the total power at
axis power 90?
A. +1.00
B. +2.00
C. +2.25
D. +2.50
+6.12/+8.12 - ANSWER-When verifying an add on on a 1 piece bifocal with a lens
clock, a +2.00 add would clock ____
in the distance and ______ in the segment.
A. +6.12/+8.12
B. +4.50/-7.25
C. +4.37/+7.12
D. +3.75/+1.00
1 diapter - ANSWER-Determine imbalance at the reading level in the following
prescription (10mm reading depth)
OD: -4.00 -2.00 x90 OS: -1.00 -3.00 x180
A. 4 diapters
B. 2 diapters
C. 1 diapter
D. No imbalance
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