ABO practice exams | Questions with 100% Verified Answers |
Latest Update 2026/2027
Question: If the wearer complains of the bifocal line being somewhat in his way when driving, the problem may
be alleviated by decreasing the distance between pads. True or False
Answer: False
Question: If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is
that:
A. The frame is too small
B. The bridge fit is tight
C. Pressure is being applied by the temple shafts anterior
to the ear.
D. Pressure is being applied on the very tips of the
temples.
Answer: Pressure is being applied by the temple shafts anterior to the ear
Question: If both nosepads press the nose or indent too much, what is probably not a possible cause?
A. Pads too small for frame weight
B. Temple spread is not even
C. Pads too close together
D. Temple tension too great
Answer: Temple spread is not even
Question: To eliminate a gap between the lens and a metal eyewire, the best alternative is to:
A. Place a strip of lens liner at a point exactly opposite
the gap
B. Place a strip of lens liner in the gap area
C. Heat the lens in the frame and allow it to cool at room
temperature
D. None of the above methods are satisfactory
E. All of the above methods are satisfactory
Answer: Place a strip of lens liner at a point exactly opposite the gap
Question: The larger the frame difference --------- the lens shape
A. Rounder
B. More squared off
C. Narrower
D. Wider
Answer: Narrower (Frame Difference=A-B)
Question: Which is the most favorable alternative to a 50/20 frame for measuring bifocal height when that
particular size is not available?
A. 52/18
B. 50/18
C. 48/20
D. 50/22
Answer: 48/20 (would want bridge to stay the same)
, Question: When the frame front is tested for four point tough, but only touches on the two temporal sides, the
frame ------ --
A. is skewed
B. has face form
C. is out of coplanar alignment
D. has X ing
E. none of the above
Answer: Has face form
Question: Which of the following errors will not be detected by a four point touch test?
A. X-ing
B. Excess face form
C. Skewing
D. All of the above can be detected using a four point
touch
Answer: Skewing
Question: It is unnecessary to use heat in adjusting a zyl frame when:
A. Bending the endpieces
B. Changing the bridge area
C. Bending the temple earpiece
D. Changing the pantoscopic angle
Answer: Changing the pantoscopic angle
Question: If you didn't adjust the eye piece on the lensometer and the power drum reads +0.25 when the
target lines are clear and focused. What do you expect the true readings for this pair of glasses be? O.D. -1.75
OS +1.75
A. -1.50, +2.00
B. -1.75, +1.75
C. -1.75, +2.00
D. -1.50, +1.75
Answer: -1.50, +2.00
Question: What is the final step in fitting a frame to a patient?
A. Aligning the frame vertically
B. Aligning the frame horizontally
C. Adjusting the pantoscopic tilt
D. Adjusting the temples
Answer: Adjusting the temples
Question: If the frame is crooked with the right side higher than the left, which is not a possible cause?
A. The left ear is lower than the right
B. The right temple is too short
C. The pantoscopic tilt of the right side needs to be
decreased.
D. The pantoscopic tilt of the right side needs to be
increased
Answer: The pantoscopic tilt of the right side needs to be increased
Latest Update 2026/2027
Question: If the wearer complains of the bifocal line being somewhat in his way when driving, the problem may
be alleviated by decreasing the distance between pads. True or False
Answer: False
Question: If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is
that:
A. The frame is too small
B. The bridge fit is tight
C. Pressure is being applied by the temple shafts anterior
to the ear.
D. Pressure is being applied on the very tips of the
temples.
Answer: Pressure is being applied by the temple shafts anterior to the ear
Question: If both nosepads press the nose or indent too much, what is probably not a possible cause?
A. Pads too small for frame weight
B. Temple spread is not even
C. Pads too close together
D. Temple tension too great
Answer: Temple spread is not even
Question: To eliminate a gap between the lens and a metal eyewire, the best alternative is to:
A. Place a strip of lens liner at a point exactly opposite
the gap
B. Place a strip of lens liner in the gap area
C. Heat the lens in the frame and allow it to cool at room
temperature
D. None of the above methods are satisfactory
E. All of the above methods are satisfactory
Answer: Place a strip of lens liner at a point exactly opposite the gap
Question: The larger the frame difference --------- the lens shape
A. Rounder
B. More squared off
C. Narrower
D. Wider
Answer: Narrower (Frame Difference=A-B)
Question: Which is the most favorable alternative to a 50/20 frame for measuring bifocal height when that
particular size is not available?
A. 52/18
B. 50/18
C. 48/20
D. 50/22
Answer: 48/20 (would want bridge to stay the same)
, Question: When the frame front is tested for four point tough, but only touches on the two temporal sides, the
frame ------ --
A. is skewed
B. has face form
C. is out of coplanar alignment
D. has X ing
E. none of the above
Answer: Has face form
Question: Which of the following errors will not be detected by a four point touch test?
A. X-ing
B. Excess face form
C. Skewing
D. All of the above can be detected using a four point
touch
Answer: Skewing
Question: It is unnecessary to use heat in adjusting a zyl frame when:
A. Bending the endpieces
B. Changing the bridge area
C. Bending the temple earpiece
D. Changing the pantoscopic angle
Answer: Changing the pantoscopic angle
Question: If you didn't adjust the eye piece on the lensometer and the power drum reads +0.25 when the
target lines are clear and focused. What do you expect the true readings for this pair of glasses be? O.D. -1.75
OS +1.75
A. -1.50, +2.00
B. -1.75, +1.75
C. -1.75, +2.00
D. -1.50, +1.75
Answer: -1.50, +2.00
Question: What is the final step in fitting a frame to a patient?
A. Aligning the frame vertically
B. Aligning the frame horizontally
C. Adjusting the pantoscopic tilt
D. Adjusting the temples
Answer: Adjusting the temples
Question: If the frame is crooked with the right side higher than the left, which is not a possible cause?
A. The left ear is lower than the right
B. The right temple is too short
C. The pantoscopic tilt of the right side needs to be
decreased.
D. The pantoscopic tilt of the right side needs to be
increased
Answer: The pantoscopic tilt of the right side needs to be increased
