Download ABO practice exam 2025-2026 and more Exams High Speed Electronics and Optoelectronics in PDF only on Docsity!
pads. 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 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 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 The larger the frame difference --------- the lens shape A. Rounder
ABO practice exam 202 5 - 2026
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 True or False - ANSWER>>False D. Temple tension too great - ANSWER
Temple spread is not even
B. More squared off C. 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/ B. 50/ C. 48/ (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 - ANSWER >>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 - ANSWER
Skewing It is unnecessary to use heat in adjusting a zyl frame when: D. Wider - ANSWER Narrower D. 50/22 - ANSWER
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 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 What type of frame may be heated until it bends under its own weight? A. Zyle B. Optyl C. Nylon 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 - For every 2 degrees of pantoscopic tilt the optical center should be: A. Raised 0.5mm B. Raised 1mm C. Lowered 1mm D. All of the above - ANSWER All of the above D. None of the above - ANSWER Optyl ANSWER >>Calculation, Spotting, Centeration, Blocking, Edging
D. Lowered 0.5mm - ANSWER
Lowered 1mm Usual reading level is considered to be ------- mm below A. 6mm B. 8mm C. 11mm D. 1mm - ANSWER 8mm The standard distance between the segments in double segment multifocals in most cases is A. 10 to 12 mm B. 13 to 14 mm C. 14 to 15 mm Photochronic lenses will be darkest on which day? A. Warm bright B. Cold bright C. Cloudy warm D. Cloudy cold - ANSWER Cold bright A Number 3 tint absorbs A. 80% of the light entering the lens B. 50% of the light entering the lens C. 60% of the light entering the lens D. 33.3% of the light entering the lens - ANSWER 80% of the light entering the lens D. 15 to 16 mm - ANSWER 13 to 14mm
- high index plastic
- steep base curve
- a frame with a small ED
- less decentration A. 1 and 2 B. 1 and 3 C. 1,3, and 4 D. 1,2,3, and 4 - ANSWER >>1,3, and 4 Rx: OD - 4.50 4BD OD - 5.00 2BO Which of the following is a usual way of ordering the lenses? A. OU - 4.50 4BD and 2BO B. OD - 4.50 2BD 1BO OS - 5.00 2BU 1BO C. OD - 4.50 4BD OS - 5.00 2BO D. OD - 4.50 2BD 1BO OS - 5.00 2BD 1BO - ANSWER
>>OD - 4.
2BD
1BO OS - 5.00 2BU 1BO
Which of the following is recommended for children's bridge? A. Saddle B. Keyhole C. Adjustable pads A frame fits perfectly on your patient. The temples, bridge, and pads are fine, but the frame sits high. You should select a frame with a bridge that is: A. Wider B. Narrower C. Higher D. Golden gate - ANSWER>>Keyhole
OU +11.00 - 1.00 x 90 ADD 3. This is an aphakic patient. He wants a separate sunglasses just for golf. What would you recommend? A. a low fitting FT 28 B. RD segment high fitted C. A trifocal D. Just a SV and tell him to slide the glasses down the nose to see near. - ANSWER >>Just a SV and tell him to slide the glasses down the nose to see near How long should a prescription of a patient be kept? A. 1 year B. 2 years C. 3 years The pantoscopic tilt can be increased up to: A. 2 to 4 degrees B. 1 degree C. 8 to 10 degrees Magnesium Fluoride is a chemical used for: A. Reducing the glare B. Reducing the reflection C. Scratch resistant The power of a bifocal add is the difference between: A. The front vertex measurement of distance and near D. Lower - ANSWER>>Wider D. As long as possible - ANSWER
years D. 18 degrees - ANSWER
degrees D. Impact resistance - ANSWER >>Reducing the reflection
induced If the right temple is angled out, this adjustment will: A. Bring the right side of the front toward the right eye B. Push the right side of the front away from the right eye C. Raise the right side of the front D. Lower the right side of the front - ANSWER >>Bring the right side of the front toward the right eye Select the correct decentration and MBS for a SV distance glasses for this patient. A=52 B=50 DBL=16 ED=53 PPD=70/67 OCHT= A. 1mm IN, 3mm UP, MBS 55 B. 1mm OUT, 3mm UP, MBS 55 C. 1mm OUT, 3mm DN, MBS 59 D. 1mm OUT, 3mm DN, MBS 55 - ANSWER >>1mm OUT, 3mm DN, MBS 59 (forgot to use largest decentration) The smaller the radius the: A. Shorter the focal length B. Longer the focal length (Because creates more power and therefor shorter focal length) Which of the following statements regarding CR-39 lenses is not correct? A. They are light B. They are thinner than glass lenses C. They scratch easily C. Less the power - ANSWER
Shorter the focal length D. They are tintable - ANSWER They are thinner than glass lenses
Which of the following lens material has the highest Abbe number? A. CR- 39 B. Polycarbonate C. Flint glass - ANSWER
>>CR-
Higher the refractive index: A. The better the absorption of uv radiation B. The worse the absorption of UV radiation C. None of the above - ANSWER >>The better the absorption of UV radiation What base curve is suitable for this Rx: - 4.00 - 1.00 x 90? A. +2.00D B. +5.00D C. Plano D. +8.00D - ANSWER>>+8.00D What base curve do you recommend for this Rx:
- 10.00 - 1.00 x 180? A. +8.00D B. +12.00D C. - 2.00D The base curve of a lens is +6.00, the cross curve is +8.00, and the sphere curve is - 5.00. What is the Rx of this lens? A. +6.00 - 5.00 x...... B. - 1.00 - 3.00 x...... C. +1.00 +3.00 x..... D. Plano - ANSWER >>Plano
B. ED 8 X 25
C. ED 13 X 25 -
ANSWER
>>ED 8 X
Which PD do we use to calculate horizontal decentration for a bifocal? A. Near PD B. Distance PD C. PPD - ANSWER
Near PD The lens clock may also be used to check: A. lens thickness B. Slab off A patient's PD is 68/64. How much is the segment inset? A. 4mm B. 2mm C. There is not enough information to ANSWER this question. - ANSWER 2mm (Maybe 1/2 distance between DPD and NPD) The segment depth in a FT 28 is 18mm. Where is the optic center of the segment. A. 5mm below the seg line B. 4mm below the seg line C. 2mm below the seg line - ANSWER 4mm below the seg line C. PD decentration - ANSWER Slab
off
The best way to heat nylon frames is by using: A. Hot air B. Hot water C. Sand - ANSWER
Hot water The type of patient often bothered by specular images is: A. The presbyopic patient B. The hyperopic patient C. The myopic patient D. One over 65 - ANSWER The myopic patient The optician has just neutralized an unknown power lens with test lenses. The test lens used to neutralize the power in the vertical is +1.00D and the test lens used to neutralize the power in the horizontal is a +1.50D. What is the Rx of this lens? (Note: these test lenses were used alone for each meridian, not superimposed. Using test lenses is another way to neutralize the lens power and can be used instead of the lensometer.) A. - 1.50 +0.50 x 90 B. +1.50 - 0.50 x 180 C. - 1.00 - 0.50 x 90 An Rx OD requires 1.5mm decentration out and 2mm seg inset. Total inset of the segment would be: A. 3.5mm In B. 1.5mm Out C. 2mm In D. 0.5mm In - ANSWER 0.5mm In
D. +1.00 +0.50 x 90 - ANSWER >>-1.00 - 0.50 x 90
B. the eye turns OUT all the time C. the eye turns IN occasionally D. the eye turns OUT occasionally - ANSWER
the eye turns OUT occasionally To correct Esophoria patient needs: A. BI prism B. BO prism C. BU prism Rx of a patient is: OD +4.00 +1.00 x 45 OS +6.00 +2.00 x 80 He chooses a new frame. You take the PD and that is 72/68. You check his old glasses. The Rx is OD +4.50 +1.00 x 35 OS +6.75 +2.00 x 90 and the MPD is 65. There is no mention of PPD in the new Rx and the patient has no complain. What would you do? A. Fill up the order form with the new PD (72) and order the lenses B. Tell the patient to come back another day for checking the PD C. Fill up the order form with the previous PD (65) and order the lenses - ANSWER >>Fill up the order form with the previous PD (65) and order the lenses Rx: OD +2.00 +4.00 x 45 OS +3.00 +1.00 x 90 A=52 DBL=18 PPD= The lab decenters the lenses the wrong way. The prism imbalance will be: A. 1.6 prism diopter B. 3.2 prism diopter C. 1 prism diopter D. 2 prism diopter - ANSWER
diopter D. BD prism - ANSWER
BO prism
A patient's best point of focus is 10". What lens would he need to see 20/20? A. - 10.00D B. +4.00D C. - 2.00D D=1/0.254m=3.94---4.00D How many recti muscles do we have? A. 4 B. 6 C. 2 A 5 years old walks to your optical dispensary. You notice that when he wants to look to the frames his right eye turns in. What is the problem? A. He has exophoria B. He has esophoria C. He has exotropia A patient brings the following Rx to you. What would you do? Rx: OD - 2.00 - 1.00 x 180 OS - 1.00 +1.00 x 180 A. After transposing the OS, you order the lenses B. After transposing the OD, you order the lenses C. You order the lenses the way they are. D. You will call the refractionist - ANSWER
You will call the refractionist Which of the following frame material should be soaked overnight periodically?
D. - 4.00D -
ANSWER
>>-4.00D
D. None - ANSWER
D. He has esotropia - ANSWER >>He has esophoria
To lengthen a face, A. choose a high temple B. choose a low temple C. choose a low bridge D. choose an adjusting nose pads - ANSWER
choose a high temple An error in standard alignment where, when viewed from the front, one lens appears to be somewhat higher than the other, is called A. X-ing B. lenses out of coplanar alignment C. lenses out of vertical alignment D. lenses out of horizontal alignment - ANSWER >>lenses out of horizontal alignment To check temple parallelism, use A. four point touch test In order to move a frame closer to a patient's face: A. decrease the face form B. narrow the adjustable pads C. increase the effective length of the guard arm In order to raise a frame higher on a patient's face: A. narrow the bridge B. bend the guard arms down B. flat surface tough test - ANSWER flat surface touch test D. widen the adjustable pads - ANSWER Widen the adjustable pads
C. narrow the distance between the adjustable pads The MRP of a progressive lens is: A. at the fitting cross B. 2 to 4 mm to the right of the fitting cross C. 2 to 4 mm below the fitting cross D. 2 to 4 mm to the left of the fitting cross - ANSWER
2 to 4 mm below the fitting cross Usually the add power is indicated at the......... and the logo of the
-4.00D D. None - ANSWER D. He has esotropia - ANSWER >>He has esophoria To lengthen a face, A. choose a high temple B. choose a low temple C. choose a low bridge D. choose an adjusting nose pads - ANSWER >>choose a high temple An error in standard alignment where, when viewed from the front, one lens appears to be somewhat higher than the other, is called A. X-ing B. lenses out of coplanar alignment C. lenses out of vertical alignment D. lenses out of horizontal alignment - ANSWER >>lenses out of horizontal alignment To check temple parallelism, use A. four point touch test In order to move a frame closer to a patient's face: A. decrease the face form B. narrow the adjustable pads C. increase the effective length of the guard arm In order to raise a frame higher on a patient's face: A. narrow the bridge B. bend the guard arms down B. flat surface tough test - ANSWER >>flat surface touch test D. widen the adjustable pads - ANSWER >>Widen the adjustable pads C. narrow the distance between the adjustable pads The MRP of a progressive lens is: A. at the fitting cross B. 2 to 4 mm to the right of the fitting cross C. 2 to 4 mm below the fitting cross D. 2 to 4 mm to the left of the fitting cross - ANSWER >>2 to 4 mm below the fitting cross Usually the add power is indicated at the......... and the logo of the manufacturer is at the ....... side 4mm below the symbols of the progressive lenses. A. Temporal Nasal B. Nasal Temporal C. There is no set rule The monocular PD measurement is recommended for
- progressive
- high index
- facial asymmetry
- CR-39 lenses A. 1 only B. 1 and 2 C. 1,2, and 3 D. 1,2,3 and 4 - ANSWER >>1,2, and 3 The causes of unequal vertex distance are
- unequal temple spread D. all of the above - ANSWER >>All of the above D. Above MRP Below MRP - ANSWER >>Nasal Temporal
