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ABO Practice Exam 2024 Questions & Answers |
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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 - ✔✔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. - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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/ D. 50/22 - ✔✔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 - ✔✔Has face form
D. Adjusting the temples - ✔✔Adjusting the temples 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 - ✔✔The pantoscopic tilt of the right side needs to be increased 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 - ✔✔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 D. All of the above - ✔✔All of the above 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 - ✔✔Optyl 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 - ✔✔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. Lowered 0.5mm - ✔✔Lowered 1mm Usual reading level is considered to be ------- mm below A. 6mm B. 8mm C. 11mm D. 1mm - ✔✔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
D. Inquire as to the budget available - ✔✔Generate in the customer confidence in your ability Rx: O.D. +2.00 +2.00 x 90 O.S. +3.00 +3.00 x 180: The tolerance of the cylinder axis of the right lens is: A. 4 degrees B. 5 degrees C. 3 degrees D. 2 degrees - ✔✔2 degrees The instrument that can help you determine a heat tempered glass lens is: A. a radiuscope B. a vertometer C. a polariscope D. a lens clock - ✔✔a polariscope For a high minus Rx, which of the following will improve the appearance of the glasses?
- 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 - ✔✔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 - ✔✔OD - 4.50 2BD 1BO OS - 5.00 2BU 1BO Which of the following is recommended for children's bridge? A. Saddle B. Keyhole C. Adjustable pads D. Golden gate - ✔✔Keyhole 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. Lower - ✔✔Wider 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. The back vertex measurement of distance and near C. The front vertex distance and back vertex near D. The vertex measurement of distance and near on the segment surface. - ✔✔The front vertex measurement of distance and near A polariscope is used to check inserted lenses for: A. Sphere power B. Cylinder power C. Axis D. Strain - ✔✔Strain A lens which reads +3.00 - 2.00 x 90 is decentered 6mm too much. How much prismatic effect will wearer experience? A. 1.8^ B. 0.6^ C. 3.0^ D. 1.2^ - ✔✔0.6^ Besides accommodation, the crystalline lens: A. focuses on distance objects B. corrects weak astigmatism C. filters the aqueous D. filters ultraviolet radiation - ✔✔Filters ultraviolet radiation When aphakic lenses are tilted too much pantoscopically, what can be expected to occur?
A. Bifocal seg will be too high B. No change will occur C. An error of refractive power is induced D. vertical imbalance will occur - ✔✔An error of refractive power is 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 - ✔✔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= 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 - ✔✔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 C. Less the power - ✔✔Shorter the focal length (Because creates more power and therefor shorter focal length)
Rx: - 10.00 - 1.00 x 180? A. +8.00D B. +12.00D C. - 2.00D D. Plano - ✔✔Plano 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. +1.00 +2.00 x.... - ✔✔+1.00 +2.00 x..... Round segment should be ordered........... then FT segs. A. Lower B. Higher C. The same - ✔✔Higher If a bifocal lens has an inset of 1mm and a seg inset of 2.5mm, what is the total inset? A. 1.5mm B. 2.5mm C. 3.5mm - ✔✔3.5mm Calculate the image jump for the following bifocal lens:
Seg style is Round 22 A. 2.50^ B. 2.75^ C. 1.50^ - ✔✔2.75^ Image Jump = Add power X dec / This trifocal is for a computer programmer: A. FT 8 x 35 B. Executive trifocal C. CRT trifocal - ✔✔CRT trifocal (CRT trifocal = special franklin with extra deep intermediate area for wider deeper mid-range reading area.) Which of the following multifocal lens styles is not an occupational lens? A. CRT 14 X 35 B. ED 8 X 25 C. ED 13 X 25 - ✔✔ED 8 X 25 Which PD do we use to calculate horizontal decentration for a bifocal? A. Near PD B. Distance PD C. PPD - ✔✔Near PD
A. The presbyopic patient B. The hyperopic patient C. The myopic patient D. One over 65 - ✔✔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 D. +1.00 +0.50 x 90 - ✔✔-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 - ✔✔0.5mm In In which of the following multifocal styles is it more difficult to fabricate both distance and near PD's accurately? A. FT 35 B. CT 28 C. RD 22 D. Executive - ✔✔Executive
What type of prismatic effect is easiest to tolerate at the near point? A. BI B. BO C. BU D. BD - ✔✔BI What would you recommend to an aphakic patient? A. AR coating B. Polarized lenses C. UV protection D. Mirror surface sun glasses - ✔✔UV protection When you are ordering UV protection, AR coating, tinting, and scratch-resistant coating which one is the last coating? A. UV B. AR C. Scratch-resistant D. Tint - ✔✔AR Exophoria means: A. the eye turns IN all the time. B. the eye turns OUT all the time C. the eye turns IN occasionally D. the eye turns OUT occasionally - ✔✔the eye turns OUT occasionally
B. +4.00D
C. - 2.00D
D. - 4.00D - ✔✔-4.00D
D=1/0.254m=3.94---4.00D How many recti muscles do we have? A. 4 B. 6 C. 2 D. None - ✔✔ 4 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 D. He has esotropia - ✔✔He has esophoria 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 - ✔✔You will call the refractionist
Which of the following frame material should be soaked overnight periodically? A. Optyl B. Polyamide C. Nylon - ✔✔Nylon A frame material which is excellent for people with an active lifestyle because of its flexibility and impact resistance; A. Cellulose acetate B. Titanium C. Nylon - ✔✔Nylon This frame material shrinks as heat is applied; A. Polyamide B. Optyl C. Cellulose acetate - ✔✔Polyamide When a progressive wearer complains of narrow reading area, what would you do? A. Increase vertex distance B. Decrease vertex distance C. Reorder the lenses D. Recommend a wide segment bifocal - ✔✔Decrease vertex distance For every one diopter increase in the base curve, vertex distance A. Increases approximately 0.6mm
