ABO practice exams Questions and
Answers
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 - correct answers:False
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. - correct answers:Pressure is being applied
by the temple shafts anterior to the ear
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 - correct answers:Temple spread is not even
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 - correct answers:Place a strip of lens liner at a point exactly
opposite the gap
The larger the frame difference --------- the lens shape
A. Rounder
B. More squared off
C. Narrower
D. Wider - correct answers:Narrower
(Frame Difference=A-B)
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 - correct answers:48/20
(would want bridge to stay the same)
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 - correct answers:Has face form
, 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 - correct answers:Skewing
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 - correct answers:Changing the pantoscopic angle
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 - correct answers:-1.50, +2.00
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
Answers
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 - correct answers:False
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. - correct answers:Pressure is being applied
by the temple shafts anterior to the ear
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 - correct answers:Temple spread is not even
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 - correct answers:Place a strip of lens liner at a point exactly
opposite the gap
The larger the frame difference --------- the lens shape
A. Rounder
B. More squared off
C. Narrower
D. Wider - correct answers:Narrower
(Frame Difference=A-B)
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 - correct answers:48/20
(would want bridge to stay the same)
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 - correct answers:Has face form
, 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 - correct answers:Skewing
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 - correct answers:Changing the pantoscopic angle
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 - correct answers:-1.50, +2.00
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
