ABO PRACTICAL STUDY GUIDE PAPER Questions with Correct
Answers (Grade A+)
Question 1: 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 2: 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 3: 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 4: 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 5: 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)
Page 1
,Question 6: 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 7: 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 8: 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 9: 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 10: 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
Page 2
, Question 11: 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
Question 12: The main reason for the use of lenticular lenses for high powers would be:
A. Cosmetic reasons
B. They have more plus power
C. They have more minus power
D. They are lighter in weight
E. They are less expensive.
Answer: They are lighter in weight
Question 13: A patient comes back to the optician complaining of pain behind the ears, possible cause
are:
A. Temple tension too great
B. Uneven pressure
C. Temple endpieces angled in too much
D. All of the above.
Answer: All of the above
Question 14: What type of frame may be heated until it bends under its own weight?
A. Zyle
B. Optyl
C. Nylon
D. None of the above.
Answer: Optyl
Question 15: The steps for "finishing" a lens (in correct order) are:
A. Centeration, Spotting, Calculation, Blocking, Edging
B. Edging, Centeration, Blocking, Spotting
C. Calculation, Spotting, Centeration, Blocking, Edging.
Answer:
1. Calculation
2. Spotting
3. Centeration
4. Blocking
5. Edging
Page 3
Answers (Grade A+)
Question 1: 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 2: 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 3: 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 4: 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 5: 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)
Page 1
,Question 6: 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 7: 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 8: 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 9: 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 10: 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
Page 2
, Question 11: 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
Question 12: The main reason for the use of lenticular lenses for high powers would be:
A. Cosmetic reasons
B. They have more plus power
C. They have more minus power
D. They are lighter in weight
E. They are less expensive.
Answer: They are lighter in weight
Question 13: A patient comes back to the optician complaining of pain behind the ears, possible cause
are:
A. Temple tension too great
B. Uneven pressure
C. Temple endpieces angled in too much
D. All of the above.
Answer: All of the above
Question 14: What type of frame may be heated until it bends under its own weight?
A. Zyle
B. Optyl
C. Nylon
D. None of the above.
Answer: Optyl
Question 15: The steps for "finishing" a lens (in correct order) are:
A. Centeration, Spotting, Calculation, Blocking, Edging
B. Edging, Centeration, Blocking, Spotting
C. Calculation, Spotting, Centeration, Blocking, Edging.
Answer:
1. Calculation
2. Spotting
3. Centeration
4. Blocking
5. Edging
Page 3
