ABO Certification Exam
Solved Questions With Revised
Correct Detailed Answers
1. How would you move a temple if the front is lower on the right?
- ANSWER Bend the right one down
2. What type of lens can be used to test prism in a patient's glasses?
- ANSWER Fresnel
3. Positive face form means the frame is bent ________.
- ANSWER The frame front bends toward the face.
4. Cellulose acetate will shrink slight if _____ and _______ quickly.
- ANSWER Heated, cooled
5. This metal is very durable but difficult to make and usually cannot be
soldered.
- ANSWER Titanium
6. The ED of a frame is ___________.
- ANSWER Twice the longest radius from the geometric center of the lens.
, 7. If the metal frames on a patient are sitting too high, you would?
- ANSWER Widen the pads
8. The bottom of the pads on a pair of glasses are too close to the eye, which
angle will you change to bring them forward?
- ANSWER Veritcal
9. If the left temple is bent upward:
- ANSWER The right side of the front will raise.
10.How can you correct a pair of glasses if they are touching the brow?
- ANSWER Lengthen the pad arms.
11.What is the axis tolerance for 2015 ANSI standards for a 1.00 cyl?
- ANSWER +/- 3 deg
12. A pair of progressives were ordered at a 22 seg ht, they came in with a seg of
21 and 23. What is the tolerance allowed for seg heights for a progressive?
- ANSWER 1.0 mm
13. For the impact tested safety eyewear, how fast is the ball moving during the
test? - ANSWER 150 ft/sec
14. A lens was ordered as a +1.50 -.75 X 23. What is the axis tolerance for this
lens? - ANSWER +/- 5 deg
, 15. How far is a ball dropped in a drop ball test? - ANSWER 50 inches
16. A pair of single vision lenses came in a metal frame, The PD is wide by 2 mm in
the right eye. The RX for this lens is +2.25. How much prism is being induced and
is this within tolerance? - ANSWER Prism is 0.45 D, yes
17. What is the tolerance for a specified base curve on a pair of glasses? -
ANSWER 0.75 D
18. The tolerance on a progressive lens sphere of -8.00 to +8.00 is _____________
diopter? 0.16D
What size of the steel ball used on a basic drop ball test?
5/8 inch
What is the tolerance for a cylinder greater than 1.50D?
+/- 2.00
A safety lens is being drop ball tested. What is the size of the ball?
1 inch
What is the tolerance for a fitting height in a progressive lens? 1.0mm
What is the tolerance for the sphere power in a SV lens that is -6.50?
+/- 0.13 D
Solved Questions With Revised
Correct Detailed Answers
1. How would you move a temple if the front is lower on the right?
- ANSWER Bend the right one down
2. What type of lens can be used to test prism in a patient's glasses?
- ANSWER Fresnel
3. Positive face form means the frame is bent ________.
- ANSWER The frame front bends toward the face.
4. Cellulose acetate will shrink slight if _____ and _______ quickly.
- ANSWER Heated, cooled
5. This metal is very durable but difficult to make and usually cannot be
soldered.
- ANSWER Titanium
6. The ED of a frame is ___________.
- ANSWER Twice the longest radius from the geometric center of the lens.
, 7. If the metal frames on a patient are sitting too high, you would?
- ANSWER Widen the pads
8. The bottom of the pads on a pair of glasses are too close to the eye, which
angle will you change to bring them forward?
- ANSWER Veritcal
9. If the left temple is bent upward:
- ANSWER The right side of the front will raise.
10.How can you correct a pair of glasses if they are touching the brow?
- ANSWER Lengthen the pad arms.
11.What is the axis tolerance for 2015 ANSI standards for a 1.00 cyl?
- ANSWER +/- 3 deg
12. A pair of progressives were ordered at a 22 seg ht, they came in with a seg of
21 and 23. What is the tolerance allowed for seg heights for a progressive?
- ANSWER 1.0 mm
13. For the impact tested safety eyewear, how fast is the ball moving during the
test? - ANSWER 150 ft/sec
14. A lens was ordered as a +1.50 -.75 X 23. What is the axis tolerance for this
lens? - ANSWER +/- 5 deg
, 15. How far is a ball dropped in a drop ball test? - ANSWER 50 inches
16. A pair of single vision lenses came in a metal frame, The PD is wide by 2 mm in
the right eye. The RX for this lens is +2.25. How much prism is being induced and
is this within tolerance? - ANSWER Prism is 0.45 D, yes
17. What is the tolerance for a specified base curve on a pair of glasses? -
ANSWER 0.75 D
18. The tolerance on a progressive lens sphere of -8.00 to +8.00 is _____________
diopter? 0.16D
What size of the steel ball used on a basic drop ball test?
5/8 inch
What is the tolerance for a cylinder greater than 1.50D?
+/- 2.00
A safety lens is being drop ball tested. What is the size of the ball?
1 inch
What is the tolerance for a fitting height in a progressive lens? 1.0mm
What is the tolerance for the sphere power in a SV lens that is -6.50?
+/- 0.13 D
