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ABO EXAM PRE-TEST
QUESTIONS AND ANSWERS 2023
"Silver halide - CORRECT ANSWER The element in photogray lenses that is responsible for the
lightening and darkening reaction is A. Silver nitrade B. Ferrous oxide C. Silver halide D. Flint"
"Compound Hyperopic - CORRECT ANSWER The refractive astigmatism indicated by the RX +1.50 -1.
x 180 is A. Compound Hyperopic B. Mixed C. Simple Myopic D. Antimetropic"
"Vertex Compensation - CORRECT ANSWER Which of the following is not a potential correction for
vertical balance? A. Slab off B. Near only readers C. Reverse slab off D. Vertex compensation"
"Amblyopia - CORRECT ANSWER The loss of vision without any apparent defect to the eye is called
A. Anisometropia B. Presbyopia C. Amblyopia D. Nystagmus"
"Polycarbonate - CORRECT ANSWER All specifications being equal which of the following materials will
yield the thinnest lens? A. CR- B. Photogray C. Polycarbonate D. Crown"
"OSHA - CORRECT ANSWER This agency is primarily concerned with safety in the workplace?
A. FDA
B. ANSI
C. FTC
D..OSHA"
"Blepharitis - CORRECT ANSWER A condition that describes an inflammation of the eyelid margins is
A. Exophoria B. Esophoria C. Blepharitis D. Strabismus"
"Cataract lenses - CORRECT ANSWER Aspheric lens surfaces are most helpful when used with which of
the following: A. Low powered lenses B. Occluder lenses C. Cataract lenses D. Sunglass lenses"
"Meniscus lens - CORRECT ANSWER A lens that is cresent shaped with one of the sides measuring a six
diopter radius is known as a : A. Periscopic Lens B. Bent Lens C. Meniscus Lens D. None of the Above"
"Base Down Prism - CORRECT ANSWER A patient complains that the floor seems to be concave, is
possible experiencing excessive A. Base In Prism B. Base Out Prism C. Base Down Prism D. Base Up Prism"
"Executive - CORRECT ANSWER Which of the following bifocals would offer the widest reading range?
A. Ultex B. D- C. Executive D. ST-40"
"1 diapter of base out prism - CORRECT ANSWER A minus 5 diapter lens decentered in 2mm beyond
what is called for to achieve the correct PD creates: A. 1 diapter of base in prism B. 1 diapter of base out prism C. 2 diapters of base in prism D. 2 diapters of base out prism"
C. Thicker nasally D. Uniform in edge thickness"
"Thicker nasally - CORRECT ANSWER A minus lens decentered "out" will result in a finished lens which
is A. Balanced B. Thicker temporally C. Thicker nasally D. Uniform in edge thickness"
"Biconcave - CORRECT ANSWER A lens having a minus curve on both front and back is called
A. Toric B. Meniscus C. Biconvex D. Biconcave"
"97% if its power - CORRECT ANSWER 80 degrees from the specified axis, a cylinder will show
A. 5% of its power B. 10% of its power C. 50% of its power D. 97% of its power"
"Hyperope - CORRECT ANSWER The type of patient often bothered by large magnified eye look is a
A. Myope B. Persbyope C. Hyperope D. Emmetrope"
"Size - CORRECT ANSWER A Box O graph is used to measure lenses for
A. Axis B. Power C. Thickness D. Size"
"Double D - CORRECT ANSWER A presbyopic electrician that works on overhead wiring would benefit
most from A. Executive bifocal B. Near only readers C. Double D D. Round Segment"
"Round segment rotated to the temporal side of the lens - CORRECT ANSWER A presbyopic golfer,
when addressing the ball, is troubled by the placement of this normal bifocal. Which of the following would pose the best solution as a recreational golf glasses? A. Executive bifocal fit 1mm lower than standard B. Double D C. Quadrifocal D. Round segment rotated to the temporal side of the lens"
"1.523 - CORRECT ANSWER The index of refraction of spectacle crown glass is
A. 1.
B. 1.
C. 1.
D. 1.59"
"Straight Top - CORRECT ANSWER Whch of the following glass lenses is a fused bifocal?
A. Executive B. Progressive C. Straight Top D. Ultex"
"Not possible - CORRECT ANSWER If the RX is +2.00 -4.00 x45, it would be necessary to decenter the
lens ______ to create 1 diapter of base out prism. A. 2mm B. 4mm C. 6mm D. Not possible"
"Anti-reflective coating - CORRECT ANSWER Which of the following would provide the greatest benefit
to a night driver? A. Polaroid B. Blue Blocker C. Anti-reflective coating D. Polycarbonate"
"Base up prismatic effect - CORRECT ANSWER A minus lens moved downward from the primary
position will result in A. Base up prismatic effect B. Base down prismatic effect C. Base in prismatic effect D. Base out prismatic effect"
"20 cm - CORRECT ANSWER The focal length of a +5.00 Diapter lens is
A. 20 cm B. 50 cm C. 39.37 inches D. 2 meters"
"Anisometropia - CORRECT ANSWER The problem of prismatic imbalance at the reading level is called
A. Antimetropia B. Anisometropia C. Anisekonia D. Emmetropia"
"20/15 - CORRECT ANSWER Which of the following indicates the most acute distance vision?
A. 20/
B. 20/
C. 20/
D. 20/25"
"Accommodation - CORRECT ANSWER The ability of the eye to focus objects at varying distances is
know as A. Presbyopia B. Objectivity C. Accommodation D. Refraction"
"Unequal size retinal images - CORRECT ANSWER Anisekonia is due to
A. Prismatic inbalance at the reading level B. Myopia C. Keratoconus D. Unequal size retinal images"
"Drooping lid - CORRECT ANSWER A ptosis crutch is used to correct
A. Prism imbalance B. Drooping lid C. Phoria D. Scotoma"
"+1.00 -1.25 - CORRECT ANSWER In neutralizing a lens of unknown power your first reading is +1.
and the next reading that focuses the cylinder target is -0.25. What is the RX? A. +1.00 -0. B. -0.25 +2.
C. +1.00 -1.
D. +0.25 +2.25"
"1 diapter base in prism - CORRECT ANSWER A +2.00 diopter lens decentered in 5mm beyond the
patients measured pd will create A. 1 diapter base out prism B. 2 diapters base out prism C. 1 diapter base in prism D. 2 diapters base in prism"
"Antimetropia - CORRECT ANSWER Which of the following conditions is indicated by the following RX:
RX +1.00 -1.00 x -2.00 -0.50 x A. Antimetropia B. Diplopia C. Hypertropia D. Isophoria"
"+2.00 -2.00 x90 - CORRECT ANSWER Which of the following has no power in the 180 degree median?
A. +2.00 -2.00 x B. +2.00 +2.00 x C. +1.00 +1.00 x D. +1.00 -2.00 x45"
"Lower the right side - CORRECT ANSWER If the right temple is angled up the effect on the frame will
be to A. Lower the right side B. Raise the right side C. Loosen the right temple D. Push the front away from the eye"
"Hunting - CORRECT ANSWER Which Recreational activity would be best suited with yellow lenses?
A. Fishing B. Hunting C. Racquetball D. Basketball"
"Slab off - CORRECT ANSWER Bicentric grinding is a term synonymous with
A. Surfacing B. Multifocals
A. +6.12/+8.
B. +4.50/-7.
C. +4.37/+7.
D. +3.75/+1.00"
"88.3mm - CORRECT ANSWER The radius of curvature of a six diapter surface is
A. 265mm B. 176mm C. 132.5mm D. 88.3mm"
"No perceived prism - CORRECT ANSWER The effect to the patient of 2 diapters of base up prism in
each eye is A. 4 diopters of base down B. 4 diopters of base up C. No perceived prism D. None of the above"
"Plus - CORRECT ANSWER A reverse slab off should be applied to the lens with the most
A. Power B. Plus C. Minus D. Thickness"
"Green Glass lens - CORRECT ANSWER The best absorber of infrared radiation is a
A. Polycarbonate lens B. Green Glass lens C. CR-39 lens D. Grey 3 Plastic lens"
"-0.50 - CORRECT ANSWER The spherical equivalent of the lens +1.00 -3.00 x90 is
A. +0.
B. -0.
C. +1.
D. -1.25"
"3 diapters base up - CORRECT ANSWER A +3.00 lens has the following prismatic effect at 10 mm
below the distance optical center: A. 3 diapters base up B. 3 diapters base down C. 1.5 diapters base in
D. 1.5 diapters base out"
"Set the front closer to the face - CORRECT ANSWER If the pad arms are shortened (pushed into the
frame) this adjustment will A. Raise the front B. Drop the front C. Set the front closer to the face D. Push the front more out"
"Increase the pantoscopic tilt - CORRECT ANSWER If the eyewires are too far from the cheeks the
adjustment to take care of this condition would be to A. Spread the pads apart B. Bend the pad arms up C. Increase the pantoscopic tilt D. Decrease the pantoscopic tilt"
"Optyl - CORRECT ANSWER Which of the frame materials is an epoxy resin that is recommended by its
manufacturer to be edged with an A box measurement of 5mm over its marked eye size? A. Cellulose Acetate B. Carbon Fiber C. Optyl D. Propionate"
"Upper Lid - CORRECT ANSWER A ptosis crutch is used to give support to the
A. Nasal Bridge B. Nose Pads C. Lower Lids D. Upper lid"
"Lensometer - CORRECT ANSWER Which of the following instruments could be used to verify slab off?
A. Polazriscope B. Disometer C. Puillometer D. Lensometer"
"Antimetropic - CORRECT ANSWER An RX with right minus and left plus is a:
A. Emmetropic B. Antimetropic C. Hetermetropic D. Isometropic"
"Compound emmetropic - CORRECT ANSWER Which of the following is not a type of astigmatism.
D. Base Up Prism"
"3.0mm - CORRECT ANSWER A minimum center thickness for a minus industrial lens according to Z
standards is A. 1.5 mm B. 2.0 mm C. 3.0 mm D. 3.5 mm"
"-2.00 -1.00 x90 - CORRECT ANSWER The optician has just neutralized an unknow power lens with test
lenses. The test lens used to neutralize the power in the vertical is a plus 2.0 and the test lens used to neutralize the power in the horizontal is a plus 3.00. What is the RX? -2.00 +0.50 x -2.00 -1.00 x 90 -1.50 -0.50 x 180 +1.00 +0.50 x180"
"Double Vision - CORRECT ANSWER The term diplopia refers to:
A. A double segmented lens B. Double Vision C. A lens with two ploplas D. None of the above"
"Total Lens Power - CORRECT ANSWER The optical cross is a graphic representation used to diagram:
A. Base curve B. Compensated vertex C. Total lens power D. Corrected curves"
"1 diapter - CORRECT ANSWER Determine imbalance at the reading level in the following prescription
(10mm reading depth) OD: -4.00 -2.00 x90 OS: -1.00 -3.00 x A. 4 diapters B. 2 diapters C. 1 diapter D. No imbalance"
"1.53 - CORRECT ANSWER The refractive index to which optical tools and gauges are calibrated is
A. 1.
B. 1.
C. 1.
D. 1.56"
"Work over their heads - CORRECT ANSWER Double D lenses are an advantage for presbyobes that:
A. Are at least 60 years old B Work over their heads C. Golf D. Are an advanced presbyope"
"50 cm - CORRECT ANSWER The focal length of a +2.00 diapter lens is
A. 200cm B. 25cm C. 100cm D. 50 cm"
"Thickness - CORRECT ANSWER Increasing the diameter of a lens always increases its
A. Vertex Power B. Thickness C. Add Power D. Radius of Curvature"
"Lens width - CORRECT ANSWER In the boxing system the A measurement represents:
A. Lens depth B. Lens width C. Diameter D. Sag Value"
"100 - CORRECT ANSWER A -3.00 powered lens has a base curve of +4.25. What is the ocular curve?
A. +3.
B. -4.
C. -3.
D. -7.25"
“150 mm - CORRECT ANSWER When ordering a six inch temple, its corresponding millimeter value is
which of the following? A. 135 mm B. 140 mm C. 145 mm D. 150 mm"
"500 mm - CORRECT ANSWER What is the focal length of a 2 diopter lens?
A. 500 cm B. 39.37 inches C. 500 mm D. 2 meters"
B. Limbus C. Canthus D. Chiasm"
"Plus or minus 7 degrees - CORRECT ANSWER The ANSI cylinder tolerance for a -0.25 cylinder is
A. Plus or minus 2 degrees B. Plus or minus 3 degrees C. Plus or minus 5 degrees D. Plus or minus 7 degrees"
"Raise the front - CORRECT ANSWER If the adjustable pads on a metal frame are repositioned
downwards into the bridge of the frame the resulting effect on the fit will be to A. Lower the front B. Increase the pantosocopic angle C. Raise the front D. Decrease the retroscopic angle"
"None of the Above - CORRECT ANSWER Which of the following RX lenses should never be put in a
Z87 Frame? A. 2mm dress lenses B. 3mm non-trademarked lenses C. 3mm tinted/non-trademarked as special purpose lenses D. None of the Above"
"Refer them back to the eye doctor - CORRECT ANSWER What should you do when a consumer comes
in and complains of severe eye pain? A. Take a complete history B. Check the eye with an ophthalmoscope C. Refer them back to the eye doctor D. Check the pupillary response to light."
"Sphere power in the 90 degree meridian - CORRECT ANSWER Which of the following is not generally
a factor in determining vertical imbalance? A. Reading depth B. Sphere power in the 90 degree meridan C. Cylinder power in the 90 degree meridan D. Add power"
