ABO EXAM PRE-TEST
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.75 -.50 x 120 - ✅The patient's RX is -1.75 -.50 x 120 with a +2.00 add standard trifocal. What is the power through the intermediate. A. -1.25 -.50 x 120 B. -.75 -.50 x 120 C. -.75 -.50 x 30 D. -1.00 -.50 x 150 -0.50 - ✅The spherical equivalent of the lens +1.00 -3.00 x90 is A. +0.50 B. -0.50 C. +1.25 D. -1.25 -0.50 -2.50 x115 - ✅Which RX of the following is the same as the following RX: -3.00 +2.50 x25 A. -3.00 +2.50 x105 B. -0.50 -2.50 x115 C. +0.50 +2.50 x115 D. +3.00 -0.50 x105 -2.00 -1.00 x90 - ✅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 x180 -2.00 -1.00 x 90 -1.50 -0.50 x 180 +1.00 +0.50 x180 -3.25 -1.50 x180 - ✅If your lensometer reads +0.25 with no lens, a lens that measures -3.00 -1.50 x180 is actually A. -2.75 -1.25 x180 B. -2.75 -1.50 x180 C. -3.25 -1.75 x180 D. -3.25 -1.50 x180 -9.50 - ✅A patient refracted at 15mm is prescribed a -10.00 shpere. The dispenser finds that the actual fitting distance will be at 10mm. What should the compensated lens power be? A. -9.50 B. -9.75 C. -10.75
D. -10.50 +1.00 -1.25 - ✅In neutralizing a lens of unknown power your first reading is +1.00 and the next reading that focuses the cylinder target is -0.25. What is the RX? A. +1.00 -0.25 B. -0.25 +2.00 C. +1.00 -1.25 D. +0.25 +2.25 +1.75 -.25 x90 - ✅What would the reading RX be if the following distance RX and bifocal addition are given: A. +.50 -.25 x90 B. +1.75 -.25 x90 C. +2.75 -.25 x90 D. +1.25 -.25 x90 +2.00 -2.00 x90 - ✅Which of the following has no power in the 180 degree median? A. +2.00 -2.00 x90 B. +2.00 +2.00 x180 C. +1.00 +1.00 x135 D. +1.00 -2.00 x45 +2.50 - ✅If the RX is OS +1.00 +3.00 x45, what would be the total power at axis power 90? A. +1.00 B. +2.00 C. +2.25 D. +2.50 +6.12/+8.12 - ✅When verifying an add on on a 1 piece bifocal with a lens clock, a +2.00 add would clock ____ in the distance and ______ in the segment. A. +6.12/+8.12 B. +4.50/-7.25 C. +4.37/+7.12 D. +3.75/+1.00 1 diapter - ✅Determine imbalance at the reading level in the following prescription (10mm reading depth) OD: -4.00 -2.00 x90 OS: -1.00 -3.00 x180 A. 4 diapters B. 2 diapters C. 1 diapter D. No imbalance
1 diapter base in prism - ✅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 1 diapter base out/each eye - ✅The P.D. written on the order is mistakenly noted as 70mm, when the actual measurement should be 66mm. What unwanted prism would be found if the distance prescription is O.U. +5.00 shpere. A. 1 diapter base out/each eye B. 1 diapter base in/each eye C. 2 diapters out/each eye D. 2 diapters in/each eye 1 diapter of base out prism - ✅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 1.00 Diapter base down - ✅The patient is looking 10 mm below the distance optical center. What is the prismatic effect to the patient from the distance RX at that level? A. 1.00 diapter base up B. 1.00 diapter base down C. 2.00 diapter base up D. 2.00 diapter base down 1.8 diapters base in - ✅A lens which reads +3.00 -2.00 x180 is decentered in 6mm too much. How much horizontal prism is created by this error. A. 1.8 diapters base in B. 1.8 diapters base out C. .6 diapters base in D. .6 diapters base out 1.53 - ✅The refractive index to which optical tools and gauges are calibrated is A. 1.49 B. 1.523 C. 1.53 D. 1.56 1.62 - ✅Given a material of unknown index and the speed of light within that material as 101,000 miles per second. Compute the index of refraction for that material. A. 1.53
B. 1.62 C. 1.75 D. 1.84 1.523 - ✅The index of refraction of spectacle crown glass is A. 1.49 B. 1.523 C. 1.53 D. 1.59 3 diapters base up - ✅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 3.0mm - ✅A minimum center thickness for a minus industrial lens according to Z87 standards is A. 1.5 mm B. 2.0 mm C. 3.0 mm D. 3.5 mm 4 diapters of prism base in - ✅If a pair of lenses are gound with diapters of base in prism in each lens, the patient will experience A. 4 diapters of prism base in B. 2 diapters of prism base out C. No prism D. None of the above 8% - ✅An uncoated normal plastic lens will reflect approximately ______% of light. A. 2% B. 4% C. 8% D. 12% 20 cm - ✅The focal length of a +5.00 Diapter lens is A. 20 cm B. 50 cm C. 39.37 inches D. 2 meters 20/15 - ✅Which of the following indicates the most acute distance vision? A. 20/20
B. 20/15 C. 20/30 D. 20/25 50 cm - ✅The focal length of a +2.00 diapter lens is A. 200cm B. 25cm C. 100cm D. 50 cm 50% - ✅Give the RX +1.00 +1.00 x 45, how much of the +1.00 cylinder is in the effect at axis 90? A. 100% B. 70% C. 50% D. 0 53mm - ✅A 10.00 diapter surface measured with a lens clock has a radius of curvature equaling; A. 60mm B. 98.6mm C. 53mm D. 88.3mm 60 - ✅An uncut lens must be at least ____mm in diameter to allow the cutting of a 52mm round lens decentered 4mm in: A. 62 B. 60 C. 58 D. 56 88.3mm - ✅The radius of curvature of a six diapter surface is A. 265mm B. 176mm C. 132.5mm D. 88.3mm 97% if its power - ✅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 100 - ✅A -3.00 powered lens has a base curve of +4.25. What is the ocular curve? A. +3.00
B. -4.25 C. -3.00 D. -7.25 150 mm - ✅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 300-380mm - ✅Which wavelengths of light have been indicated as contributors to the onset of cataracts? A. 700-800 nm B. 400-550 nm C. 300-380 nm D. 100 - and below nm 500 mm - ✅What is the focal length of a 2 diopter lens? A. 500 cm B. 39.37 inches C. 500 mm D. 2 meters Accommodation - ✅The ability of the eye to focus objects at varying distances is know as A. Presbyopia B. Objectivity C. Accommodation D. Refraction Amblyopia - ✅The loss of vision without any apparent defect to the eye is called A. Anisometropia B. Presbyopia C. Amblyopia D. Nystagmus Anisometropia - ✅The problem of prismatic imbalance at the reading level is called A. Antimetropia B. Anisometropia C. Anisekonia D. Emmetropia Anti-reflective coating - ✅Which of the following would provide the greatest benefit to a night driver?
A. Polaroid B. Blue Blocker C. Anti-reflective coating D. Polycarbonate Antimetropia - ✅Which of the following conditions is indicated by the following RX: RX +1.00 -1.00 x180 -2.00 -0.50 x45 A. Antimetropia B. Diplopia C. Hypertropia D. Isophoria Antimetropic - ✅An RX with right minus and left plus is a: A. Emmetropic B. Antimetropic C. Hetermetropic D. Isometropic Base Down Prism - ✅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 Base up prism - ✅A patient that complains that the floor seems to be convex is possibly experiencing excessive A. Base In Prism B. Base Out Prism C. Base Down Prism D. Base Up Prism Base up prismatic effect - ✅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 Biconcave - ✅A lens having a minus curve on both front and back is called A. Toric B. Meniscus C. Biconvex D. Biconcave
Blepharitis - ✅A condition that describes an inflammation of the eyelid margins is A. Exophoria B. Esophoria C. Blepharitis D. Strabismus Canthus - ✅The corner of the eye where the upper and lower lids meet is the A. Iris B. Limbus C. Canthus D. Chiasm Cataract lenses - ✅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 Compound emmetropic - ✅Which of the following is not a type of astigmatism. A. Compound emmetropic B. Simple hyperopic C. Compound myopic D. Simple myopic Compound Hyperopic - ✅The refractive astigmatism indicated by the RX +1.50 -1.00 x 180 is A. Compound Hyperopic B. Mixed C. Simple Myopic D. Antimetropic Compound one another - ✅When two light wavesw are in "in phase" they will A. Destroy on another B. Reduce each front by half C. Compound one another D. None of the above Decrease the plus power - ✅If a patient is wearing a +12.00 diopter sphere and the adjustment is made to move them closer to the eyes, what effect will that have on the effective power of the lens? A. Decrease the plus power B. Increase the plus power C. Cause base in prism D. Cause base out prism
Double D - ✅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 Double Vision - ✅The term diplopia refers to: A. A double segmented lens B. Double Vision C. A lens with two ploplas D. None of the above Drooping lid - ✅A ptosis crutch is used to correct A. Prism imbalance B. Drooping lid C. Phoria D. Scotoma Executive - ✅Which of the following bifocals would offer the widest reading range? A. Ultex B. D-35 C. Executive D. ST-40 Green Glass lens - ✅The best absorber of infrared radiation is a A. Polycarbonate lens B. Green Glass lens C. CR-39 lens D. Grey 3 Plastic lens Hunting - ✅Which Recreational activity would be best suited with yellow lenses? A. Fishing B. Hunting C. Racquetball D. Basketball Hyperope - ✅The type of patient often bothered by large magnified eye look is a A. Myope B. Persbyope C. Hyperope D. Emmetrope
Increase the pantoscopic tilt - ✅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 Internal Rotator - ✅Which of the following is NOT one of the 6 muscles responsible for the movement of the eye? A. Superior Rectus B. Inferior Rectus C. Internal Rotator D. Inferior Oblique Lens Curvature - ✅The Geneva lens measure is designed to measure A. Path length B. Refractive efficiency C. Focal length D. Lens Curvature Lens width - ✅In the boxing system the A measurement represents: A. Lens depth B. Lens width C. Diameter D. Sag Value Lensometer - ✅Which of the following instruments could be used to verify slab off? A. Polazriscope B. Disometer C. Puillometer D. Lensometer Less Oblique Astigmatism - ✅Corrected curve lenses have A. Less Divergence B. More Plus Power C. Less Plus Power D. Less Oblique Astigmatism Lower the right side - ✅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
Meniscus lens - ✅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 Millimeters - ✅Overall frame measurements are stated in A. Millimeters B. Centimeters C. Decimeters D. Meters Mixed - ✅The refractive astigmatism indicated by the RX +1.50 -1.75 x 35 is A. Compound Hyperopic B. Mixed C. Simple Myopic D. Antimetropic Nanometers - ✅Wavelengths are measured in A. Meters B. Decimeters C. Centimeters D. Nanometers No perceived prism - ✅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 None of the Above - ✅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 Not possible - ✅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
One diapter - ✅Given a lens with a focal length of 1000mm / determine the power of the lens. A. One diapter B. Five diapters C. Ten diapters D. One hundred diapters Optyl - ✅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 OSHA - ✅This agency is primarily concerned with safety in the workplace? A. FDA B. ANSI C. FTC D..OSHA Plus - ✅A reverse slab off should be applied to the lens with the most A. Power B. Plus C. Minus D. Thickness Plus or minus 3 degrees - ✅The cylinder axis tolerance for a 1.00D cylinder according to ANSI Z80.1 is A. Plus or minus 7 degrees B. Plus or minus 5 degrees C. Plus or minus 3 degrees D. Plus or minus 2 degrees Plus or minus 7 degrees - ✅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 Polycarbonate - ✅All specifications being equal which of the following materials will yield the thinnest lens? A. CR-39 B. Photogray
C. Polycarbonate D. Crown Polycarbonate - ✅Which of the following materials would make the safest lens in all circumstances? A. CR-39 B. Flint Glass C. Crown D. Polycarbonate Raise the front - ✅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 Refer them back to the eye doctor - ✅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. Round segment rotated to the temporal side of the lens - ✅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 Set the front closer to the face - ✅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 Silver halide - ✅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
Size - ✅A Box O graph is used to measure lenses for A. Axis B. Power C. Thickness D. Size Slab off - ✅Bicentric grinding is a term synonymous with A. Surfacing B. Multifocals C. Slab off D. Progressives Sphere power in the 90 degree meridian - ✅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 Straight Top - ✅Whch of the following glass lenses is a fused bifocal? A. Executive B. Progressive C. Straight Top D. Ultex Thicker nasally - ✅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 Thicker temporally - ✅A plus lens decentered "out" will result in a finished lens which is A. Balanced B. Thicker temporally C. Thicker nasally D. Uniform in edge thickness Thickness - ✅Increasing the diameter of a lens always increases its A. Vertex Power B. Thickness C. Add Power D. Radius of Curvature Total Lens Power - ✅The optical cross is a graphic representation used to diagram:
A. Base curve B. Compensated vertex C. Total lens power D. Corrected curves Unequal size retinal images - ✅Anisekonia is due to A. Prismatic inbalance at the reading level B. Myopia C. Keratoconus D. Unequal size retinal images Upper Lid - ✅A ptosis crutch is used to give support to the A. Nasal Bridge B. Nose Pads C. Lower Lids D. Upper lid UVC - ✅Which of the following has the shortest and therefore most harmful wavelength? A. UVC B. UVB C. UVA D. INFRARED Vertex Compensation - ✅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 Work over their heads - ✅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