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National Certification Organization
for Opticians
ABO American Board of Opticianry
ABO Master in Ophthalmic Optics
Certification Exam (ABO-M)
Course Title and Number: (ABO-M) Ophthalmic Optics Certification Exam Title: ABO-M Certification Exam Exam Date: Exam 2025- 2026 Instructor: ____ [Insert Instructor’s Name] _______ Student Name: ___ [Insert Student’s Name] _____ Student ID: ____ [Insert Student ID] _____________
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ABO Optical Exam Review Questions and Answers | 100% Pass Guaranteed | Graded A+ | 2025- ABO-M Master in Ophthalmic Optics Certification Exam ABO American Board of Opticianry Read All Instructions Carefully and Answer All the Questions Correctly Good Luck: - OcHt - =Answer>> Optical center height The distance from the center of the pupil to the deepest B portion of the eyewire; needed for progressive lenses - =Answer>> OcHt Unwanted prism that occurs when the OC of a lens is not correctly placed in front of the patient's MRP - =Answer>> Induced prism Prism that is tested by & written into a Rx by an optometrist to assist in the redirection of muscular imbalance - =Answer>> Prescribed prism ANSI standard for horizontal variance is ___ (D) within ___ (mm) of the MRP - =Answer>> 2/3 D, 2.5 mm ANSI standard for vertical variance is ___ (D) and less than or equal too ___ (mm) the MRP - =Answer>> 1/3 D, 1.0 mm Light falling on the front surface of a spectacle lens is: Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔 Ctrl + Click Here To 📑ORDER NOW 📑 Follow Link 🤔 ORDER NOW 🤔 🎓 TO GET INSTANT EXPERT HELP 🎓 🤔 ORDER NOW 🤔
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B) 1/2 as large as the object C) twice as large as the object D) as far behind the mirror as the object is in front of it. - =Answer>> D) as far behind the mirror as the object is in front of it. The velocity of light is least in: A) air B) polycarbonate C) water D) flint glass - =Answer>> D) flint glass What is prism in simplest terms? - =Answer>> A wedge of transparent material used to disperse and or deviate light. Define Phoria - =Answer>> A TENDENCY to cross (not cosmetic) Define Tropia - =Answer>> An actual "crossing" very noticeable. Crown glass index - =Answer>> 1. Which lens has more aberrations? A) Flint Glass B) Crown Glass - =Answer>> A) Flint Glass Plus Lenses can be A) Convex B) Concave C) Both - =Answer>> A) Convex (plus lenses can be equiconvex, Flat convex, Double covex/biconvex or Meniscus) Minus Lenses Can Be A) Convex B) Concave C) Both - =Answer>> B) Concave Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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(minus lenses can be equiconcave, flat concave, double concave/bioconcave or meniscus) Nominal power equation - =Answer>> Dn= D1+D2. (Lens power (Dn) equals the power of the front surface (D1) and the power of the back surface (D2) of the lens) The wavelength of the infrared waves in the electromagnetic spectrum are: A) longer than visible red light waves B) shorter than the visible red waves C) 550 nanometers D) between 380 and 780 nanometers - =Answer>> A) longer than visible red light waves The Geneva Lens Measure is calibrated for a refractive index of: A) crown glass B) CR- C) 1. D) 1.234 - =Answer>> C) 1. A lens made from 2 Convex surfaces: A) corrects myopia B) corrects astigmatism C) makes objects appear smaller D) has against motion - =Answer>> D) has against motion A lens reads +4.25 in the vertometer. If the ocular curve is - 4.00 what is the front base curve? A) +0.25D B)+4.00D C)+6.25D D)+8.25D - =Answer>> D)+8. Which of these front base curves would be suitable for a -3.00D meniscus lens? A) Plano B) -3. C)+2. Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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Selecting a new frame involves several aspects. The most obvious is: A) the frame should center the pupils in the lenses B) how the frame shape relates to the face shape C) the correct frame will have minimal decentration D) all of the above - =Answer>> D) all of the above Seg height of this multifocal type is measured from the bottom of the pupil to the deepest B portion of the eyewire - =Answer>> Trifocal Seg height of this multifocal type is measured from the lower eyelid to the deepest B portion of the eyewire - =Answer>> Bifocal Measurement obtained by the formula A-B - =Answer>> Frame difference Radiation type of wavelengths shorter than 400 nm - =Answer>> UV radiation Division of UV radiation ranging from 290-200 nm & is extremely dangerous, absorbed by the ozone layer - =Answer>> UV C Division of UV radiation ranging from 320-290 nm & causing sunburn, corneal burn, retinal damage, & eventually cataracts; mainly absorbed by the cornea & partly the crystalline lens - =Answer>> UV B Division of UV radiation ranging 400-320 nm & causing suntan & cataracts; primarily absorbed by the crystalline lens - =Answer>> UV A The FDA requires that sun lenses transmit no more than __% of UV A & no more than __% of UV B - =Answer>> 5, 1 Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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Lenses that go beyond UV wavelength for superior protection - =Answer>> Glare control lenses Radiation type of wavelength 750-1400 nm - =Answer>> Infrared radiation The breaking down of white light into seven component colors - =Answer>> Dispersion When white light enters the eye, this color focuses upon the retina - =Answer>> Green When white light enters the eye, this color focuses beyond the retina - =Answer>> Red When white light enters the eye, this color focuses in front of the retina - =Answer>> Blue One meter is equivalent to this amount of inches - =Answer>> 39.37 in One inch is equivalent to this amount of mm - =Answer>> 25.4 mm The range of visible light - =Answer>> 390-750 nm Theory that describes light as moving in waves, like the motion of waves in water - =Answer>> Wave theory Isaac Newton's theory that describes light as being minute particles, called photons, which originate from the light's source
- =Answer>> Corpuscular theory The density of any given material - =Answer>> Index of refraction The bending of light - =Answer>> Refraction Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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Lens power in terms of focal length (m) - =Answer>> D = 1/f Focal length (m) in terms of lens power - =Answer>> f = 1/D Prism diopters = F * dec (mm) / 10 - =Answer>> Prentice's Rule The type of image formed by a plus lens - =Answer>> Real image The type of image formed by a minus lens - =Answer>> Virtual image An image is always displaced toward this part of the prism - =Answer>> Apex A wedge of optical material - =Answer>> Prism Endpiece style where the temple front is straight & meets the frame front at a 90 degree angle - =Answer>> Butt style Endpiece style where the frame & temple are cut & meet at a 45 degree angle - =Answer>> Mitre style Endpiece style where the frame front bends back & the temple is attached slightly behind the frame front - =Answer>> Turn- back style The range of pantoscopic angle for most frames - =Answer>> 8-10 degrees The range of pantoscopic angle for frames with progressive lenses - =Answer>> 10-12 degrees Frames marked "Z87" on each temple & on the frame front, with a min. thickness of 3.0 mm - =Answer>> Safety frames Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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Alignment of the bridge so it balances the entire weight & frame assembly - =Answer>> Standard alignment When a ruler is placed at the back of the frame from temple to temple & is touching the top of the nose pads, the frame achieves this type of alignment - =Answer>> Horizontal alignment With the glasses placed upside down, the temples sit flat & the frame does not wobble, achieving this type of alignment - =Answer>> Temple parallelism The temple spread angle on a frame should be approx. ___ (degrees) & the temple shafts themselves must be straight - =Answer>> 95 degrees Part of the frame that consists of 2 eyewires, a bridge, & a pair of endpieces - =Answer>> Frame front Part of the frame that extends to the ear & holds the spectacles in place - =Answer>> Temples Category of temples that bend down behind the ear & follow the contour of the skull, resting evenly against it - =Answer>> Skull temples Category of temples which are generally straight & hold the glasses on primarily by pressure against the side of the head - =Answer>> Library temples Category of temples that can be used either as skull or library temples depending on the manner in which they are bent - =Answer>> Convertible temples Category of temples which curve around the ear & extend to the level of the ear lobe; often used in children's frames & safety eyewear - =Answer>> Riding-bow temples Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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The distance from the outer portion of the right eyewire to the inner portion of the left eyewire - =Answer>> FPD The distance from the geometric center of one eyewire to the geometric center of the other, also called DBC or FPD - =Answer>> GCD GCD can be theoretically calculated by adding these 2 measurements - =Answer>> A, DBL Distance from the center of the center barrel screw hole to the end of the temple tip - =Answer>> Overall temple length LTB - =Answer>> Length to bend Measurement from the center of the barrel to the middle of the bend - =Answer>> LTB FTB - =Answer>> Front to bend Distance between the plane of the frame front & the bend of the temple - =Answer>> FTB Formula for the amount of horizontal decentration - =Answer>> (GCD-PD) / 2 MRPs - =Answer>> Major reference points The process of moving the MRP to a place in the frame that properly corresponds with the PD - =Answer>> Decentration MBS - =Answer>> Minimum blank size The smallest possible lens blank that will work for any given frame & PD combination - =Answer>> MBS Formula for determining MBS - =Answer>> (GCD - PD) + ED Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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Amount of mm added to MBS to allow for imperfections (chips, bubbles) that may exist along periphery of uncut lens - =Answer>> 2-3 mm Range of lens diameters available from manufacturers - =Answer>> 65-80 mm Formula for calculating vertical decentration - =Answer>> Seg height - (B/2) This is calculated when determining where the line or fitting cross of a multifocal lens is positioned relative to the datum line
- =Answer>> Vertical decentration A segment line whose vertical decentration is -3 would be referred to as "3 ___ (below/above)" - =Answer>> Below Trade name for cellulose acetate - =Answer>> Zylonite Frame material most used for plastic frames; cotton/wood flake product, can be mass-produced in various colors, textures & patterns - =Answer>> Cellulose acetate Durable frame material that is injection molded; ideal for wrap around shapes; requires less heat for adjustments/lens insertions - =Answer>> Cellulose proprionate Epoxy frame material; light in weight, can't be overheated/burned, won't shrink; original shape "memory" - =Answer>> Optyl Synthetic frame material; light weight, very strong, used in children's frames & safety eyewear; requires good deal of heat for adjustments/lens insertions (2) - =Answer>> Nylon, carbon fiber Frame material of high tensile strength; injection molded, very strong (2) - =Answer>> Rubber, kevlar Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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Frame style that has a metal chassis combined with plastic top, rims, & temples - =Answer>> Combination frame Frame style designed to sit lower on nose than normal to allow wearer to look over frame; used mostly for patients with reading correction only - =Answer>> Half-eye frame Frame style in which the lens are mounted in three-places - the bridge & the 2 endpieces - =Answer>> Full rimless frame Frame style in which a bar connects the endpieces to the bridge & the lenses are mounted - =Answer>> Semi-rimless frame Bridge type designed to evenly distribute the weight over a wide area of the frame; can't really modify, so must fit comfortably - =Answer>> Saddle bridge Higher-fitting bridge type designed to rest glasses entirely on plastic nose pads, which can be manipulated - =Answer>> Keyhole bridge Bridge type in which plastic nose pads give a lower-fitting appearance - =Answer>> Semi-saddle bridge Bridge type in which weight of glasses is concentrated on adjustable nose pads, which must be properly positioned for even weight distribution - =Answer>> Adjustable pad bridge Bridge type similar to saddle bridge but mounted on a metal frame, distributing weight over wide area - =Answer>> Contour bridge Lens-mounting method in which a screw is placed through a drilled hole in the lens then attached to the frame - =Answer>> Screw mounting Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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Type of screw mounted design where each lens is held in place by only one screw - =Answer>> Numont mounting Type of screw mounted design where clips attached to the eyewire fit into notches in the lens & are held in place with tension - =Answer>> Tension mounting Another name for tension mounting - =Answer>> Balgrip mounting Popular semi-rimless screw mounted design in which a nylon cord attached to the eyewire fits into a grove located around the lens periphery - =Answer>> Nylon mounting Most frame shapes will be suitable for this face shape - =Answer>> Oval Deep frame shapes preferably with low temple attachment is recommended with this face shape - =Answer>> Oblong This face shape recommends relatively narrow frame shapes, preferably with high temple attachment (2) - =Answer>> Round, square This face shape recommends that the width of frame should approx. equal lower widest part of facial area; darker colors work well - =Answer>> Triangular Lighter looking frame is recommended, such as metal, rimless, or lighter colors in zyl for this face shape - =Answer>> Diamond The principle of fitting frames in which three points, the bridge & both sides of the head behind each ear, are the only points that come into physical contact with the wearer - =Answer>> The fitting triangle Tilt of front frame recommended when pupil is positioned several mm above the OC - =Answer>> Pantoscopic tilt Need Writing 🤔Help? We've Got You Covered! ✍ 100% NO A I or Plagiarism Guaranteed🤔
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