Ophthalmic Dispensing Practice Test

These questions are part of the practice quiz. Start practicing

• Polycarbonate should be used in:
• From where is multifocal height usually measured?
• Which bifocal segment style is most likely used for a child?
• Which lens material is known for being especially impact resistant?
• In what way do progressive addition lenses differ from traditional bifocals?
• Myopia is always corrected using which type of power?
• In which condition do the bottoms of the eyewires extend further out than the tops?
• What type of frame is most suitable for children?
• What is the weight of the steel ball used in a Drop Ball Test for dress safety lenses?
• It may be necessary to figure the segment inset for each eye separately for persons with:
• If B=44, what is the bifocal height if the segment is to be set 3 mm below?
• If a frame's dimensions are A=50 and C=48, with a frame difference of 8, what is the B?
• Which lens mounting attaches separate bridge and temples to the lenses using screws or clamps?
• What indicates that a prescription corrects for Against-the-Rule Astigmatism?
• During bicentric grinding for prism correction, which direction is typically ground into the lens?
• If the segment of lenses appears too high for the wearer, what action might the dispenser take?
• Which adjustment is used to lower the front of the frame?
• What is one method to remove a stuck screw?
• What is the relationship between effective power and vertex distance?
• Why are polycarbonate lenses important for children?
• If the eyewires are touching the cheeks, which adjustment should be made?
• If one surface of a lens is plano and the other is a plus surface, the lens is referred to as:
• What is the primary goal of the first few minutes of contact with a new consumer?
• What is a recommended solution for a screw that continually loosens?
• Where is the prismatic effect verified on a P.A.L.?
• What type of error occurs when a lens is centered incorrectly over the pupillary axis?
• Which temple is specifically designed to enhance safety and reduce the risk of dislodging during physical activities?
• Which type of frame is often recommended for high prescription lenses?
• What critical measurement is particularly important when fitting progressive addition lenses?
• What adjustment should be made if the right side of eyewear is closer to the wearer's face than the left side?
• How much clearance, in millimeters, should there be between the nose and the free side of the bridge when checking bridge size?
• What instrument is used to measure vertex distance?
• Most aspheric surfaces are primarily manufactured through which method?
• What bridge design is common in plastic frames and is designed to evenly distribute weight over the nose?
• When fitting a progressive addition lens (PAL) for a child, where should the fitting cross height be?
• What vertex measurement is recommended for optimum performance when fitting progressive addition lenses?
• What should be done if the top of the frame front presses against the brow?
• When a wearer complains they need to raise their chin to read, what should you do to the segment height?
• What is the specification for the Drop Ball test for general wear eyewear according to ANSI?
• Which bridge design is suitable for a person with a long nose?
• According to FDA regulations, what is the height for the standard Drop Ball test?
• What is the primary purpose of anti-reflective coatings on lenses?
• Where should segment heights be measured when fitting a new pair of glasses?
• Converting a written prescription from plus to minus cylinder form is known as:
• Which of the following occupations might be best suited with double segment lenses?
• What adjustment should be made if a patient complains that their frames sit too low?
• On which type of day do most photochromic lenses appear the darkest?
• What does the designation DBL indicate when used in connection with a frame?
• Which lens type is designed to provide clear vision at all distances?
• Which measuring tool is best for determining segment height accurately?
• What is the purpose of an anti-reflective coating on eyeglasses?
• For glasses where the MRP is 5 mm below the wearer's pupils, what is the recommended pantoscopic tilt?
• When positioning adjustable pads on the nose, what should the ideal result be?
• Anisometropia is a condition in which:
• What factor is crucial when determining segment height for any bifocal wearer?
• For a frame with an extreme nasal sweep, what must the dispenser be cautious of?
• Which frame material is known for its light weight and flexibility?
• When using an OC height for aspheric lenses, what should be done concerning the pantoscopic angle?
• What must be measured for high index materials and polycarbonate lenses?
• How should the dispensers adjust the temples if the bottom of glasses rests on the wearer's cheeks?
• Fresnel optics can be used for which application?
• For an Rx of +12.50 OU, what is the recommended seg height?
• What happens if the pads are flared out more?
• A single vision lens has the power of -3.50 -1.25 x 030 with a base curve of +6.00. What would the curves ground on the optical surface be:
• When using pliers to help tighten a loose temple, how should the jaws be positioned when open?
• What happens to vertex distance with every 1 diopter increase in base curve?
• A lens prescription of -2.25 D is made on a +6.00 base curve. The curve ground into the ocular surface would be:
• What is the most consistent reference point for traditional bifocal height measurement?
• What could a dispenser do if the frame slides down the wearer's nose?
• What will bending the pad arms up and realigning the pads do?
• What action should be taken first if a patient has scratched their lenses?
• What factor is crucial for ensuring the proper fitting of bifocals in children?
• A nylon-based spectacle frame material that is very strong, very lightweight, translucent, hypoallergenic, and can be made very thin, is:
• What is a primary function of safety glasses in industrial environments?
• What is the primary reason for coating lenses with a metallic film like magnesium fluoride?
• When measuring the binocular interpupillary distance with a ruler, you may measure from:
• In general, which of the following indicates a frame is a good option for strong prescriptions?
• What should be done if the segments seem too high?
• What condition might require prescription eyewear to manage visual symptoms?
• What is recommended for polishing the edges of a high minus lens?
• What type of frame mounting holds the lenses in place without using eyewires or nylon cords?
• What does the abbreviation "PD" commonly refer to in optical measurements?
• What is a Lensometer used for?
• What is the average convergence distance in children?
• Given frame measurements A=48, B=46, E.D.=54, and DBL=18, which seg height is not acceptable for double D's?
• Dissimilar segments are rarely used to compensate for which issue?
• The term "bowing" temples refers to which of the following?
• With excessive or unwanted base down prism:
• A person with a stooped posture may need the bifocal segment placed where?
• Which frame construction is considered the least desirable for children?
• Which style of temple typically provides a more secure fit for active children?
• Which adjustment will lower the front of the frame?
• What is the most accurate tool for measuring vertex distance?
• Which of the following prescriptions shows the presence of antimetropia?
• What type of lens is primarily used for correcting astigmatism?
• What band of solar radiation is characterized mainly by its thermal effect?
• In mounting a lens in a nylon suspension type frame, what process must be used?
• Which instrument is used to check for strain in a lens?
• What is the name of the lens mounting that uses one screw at the bridge area to attach each lens?
• What might a dispenser do if the segment seems too high to the wearer?
• A temple marked 5 1/2 inches corresponds closest to which of the following lengths?
• Which lens mounting has an arm that follows the upper posterior surface of the lens and usually has two screws through each lens?
• What is the name of the clear plastic bridge strap attached to nosepad arms, replacing two individual pads?
• When instructing a new bifocal wearer, what is a recommended approach?
• What is required when the wearer's P.D. is less than the frame P.D.?
• Which method is NOT used for determining monocular segment height for a progressive addition lens?
• Under what condition are the OC and MRP at the same point on the lens?
• Aphakic patients wearing strong cataract lenses would benefit most from which fitting technique?
• A power cross is:
• To match the segment height to an old bifocal if it is 3 mm below the lower lid margin, where should the new segment be placed?
• Which bifocal type allows the optical center to be placed on the segment line?
• The adjustment needed for a frame that is too loose around the temples is?
• Which face shape is most conducive to wearing glasses?
• Which temple style is typically made of plastic and used for children’s frames?
• Which type of bridge is a clear plastic saddle-type attached to a metal frame without nosepad arms?
• The term for the bending of light as it passes from one medium to another is:
• Transpose the following prescription into plus cylinder form: -2.00 -1.25 x 090:
• If the distance binocular P.D. is 68 and the near P.D. is 64, the segment inset will be:
• If pad arms are bent downward too much, what adjustment should be made?
• For bifocal lenses, which reference point is often used for measurement?
• What is the primary function of a library temple?
• What is the minimum blank size calculation requirement for a wearer with a P.D. of 55 mm and an A measurement of 52 mm?
• If the right temple is angled down, what adjustment will raise the right side of the front?
• Which length would a temple marked 5 inches be closest to?
• Which lens would still be acceptable if the distance P.D. were fabricated 5 mm too wide?
• What is a characteristic of the basic construction of a progressive addition lens?
• Which temple type extends down to the level of the earlobe and is often used for children's frames?
• What does it mean when a frame has pantoscopic tilt?
• When measuring the base curve on an Executive-style bifocal, where should the 3 pins of the clock be placed in relation to the dividing line?
• Which frame material is known for its high resistance to corrosion and flexibility, making it suitable for temples?
• Frames that are suitable for use as safety glasses must have "Z87" stamped on the:
• If the wearer's lashes rub against the back of the lenses, what adjustment should the dispenser consider?
• Which bifocal style would have the least total prismatic effect in the reading area for the Rx -9.50 O.S. ADD +2.50?
• What is a correct adjustment if the patient's glasses push too far down the nose?
• When adjusting a saddle or contoured bridge, which angle should parallel the angle of the nose to the facial plane?
• What is the primary reason for adjusting frame fit over the ears?
• What condition does a frame exhibit if it has positive face-form?
• If the P.D.=65/62 and the Rx=+4.00 OU, Add +4.00, what is the recommended inset?
• A material used to create thin, strong, very lightweight frames, but that results in a material that is not adjustable and is therefore used mainly for frame fronts is:
• What factor can affect the fitting and alignment of the frame and lenses?
• What is the temple style that bends at the top of the ear and fits evenly against the skull?
• What does a keyhole bridge primarily do?
• What angle might need adjustment if a child's bridge is extremely flat?
• What type of temple is made of a flexible coil of metal and follows the contour of the skull?
• Which type of lens is thicker in the middle and thinner at the edges?
• A person with erect posture, head held back, would need his segs set ___ when measuring for a multifocal lens.
• What happens to the weight distribution when using a strap bridge?
• To relieve tension on both ears, what adjustment should be made?
• What describes a combination frame?
• Overall temple measurement is most often stated in:
• Bicentric grinding is also known as what?
• What is the recommended adjustment if the eyewear appears uneven on the wearer's face?
• When choosing a frame for a progressive addition lens wearer, which frame shape should be avoided?
• What is the maximum angle used for a bifocal segment called?
• Which temple design is best for individuals with an active lifestyle?
• What type of bridge should an individual with very close-set eyes select for their frames?
• What adjustment will occur if the right temple is angled out?
• When choosing a frame for a wearer of PAL's, what is the most important factor to consider?
• In what situation should separate heights be discussed with a wearer?
• When measuring segment height for a progressive addition lens, which method is correct?
• What action should be taken if there’s excessive vertex distance?
• Which feature is least important when selecting frames for children?
• If the lenses are not centered correctly in the eyewear, what should be the likely adjustment?
• What consideration is most important when dealing with posture adjustments for bifocal segments?
• What adjustment would relieve excessive pressure causing soreness at the back edge of the nose pads?
• What adjustment should be performed if the glasses fit too far away from the wearer's face?
• Which of the following is not related when calculating the sagittal depth in an uncut lens?
• When adjusting a library temple, where should it touch the side of the head?
• A temple that is marked 6.5 inches would be closest in length to which of the following temples?
• What instrument is designed to measure the sagitta of a lens curve?
• When will the optical center and MRP be located at the same point on the lens?
• A frame marking of 50 20 means the:
• In multifocal lenses, the segment height is most critical for which type of vision?
• Which condition is often addressed with bifocal lenses?
• If a frame bridge rests solely on the top of the nose, which angle is likely incorrect?
• If glasses slide off the wearer’s nose despite a correct fit, what is the best solution?
• What is the significance of the nose bridge fit for eyeglasses?
• A thermoplastic frame material that is molded instead of stamped out, and therefore returns to its original shape when heated is:
• What is a key factor to consider when selecting frames for elderly patients?
• What is the refractive index of CR-39 lenses?
• Bringing the pads closer together will have what effect on the front of the frame?
• What angle should be matched to achieve the correct splay angle in pediatric fitting?
• Lens calipers are commonly used to measure:
• If the right side of the eyewear is higher on the wearer's face than the left side, what adjustment should be made?
• What are Clip-Ons in relation to spectacles?
• If a consumer states that their old glasses provide better visual acuity than their new glasses with the same prescription, what should the optician check first?
• If there was a PAL fitting height of 24 mm for each of the following, which lens shape would be your last choice for a PAL?
• What component helps distribute the weight of the frame over the nose area?
• A patient has a prescription of +12.50 diopters with a vertex distance of 12mm but the lens will set 14mm from the eye. What adjustment is needed?
• Astigmatism is corrected by a lens featuring what type of power?
• When adjusting nose pads on a child, what is usually required?
• A spectacle frame material that has high flexibility and will maintain the flexibility if soaked overnight periodically in water is:
• What is the refractive index of crown glass lenses?
• Which ingredient in photochromic glass darkens the lens when exposed to ultraviolet light?
• What effect does lengthening the pad arms have on the frame?
• The most common metal used for spectacle frames, composed mainly of nickel, with the second largest component of copper, is:
• Which statement is true regarding the saddle bridge design?
• To widen the distance between the pads of a frame or mounting, bend the pad arms:
• Who determines where the distance power should be verified when neutralizing a progressive addition lens?
• The pupillary distance (P.D.) measured while focusing on a point 24 inches in front is referred to as what type of P.D.?
• In terms of comfort, which temple design is known for its flexibility and adaptation to head shape?
• Which type of lens requires proper placement of the corridor?
• When anti-reflective lens coating is applied, what is the thickness of the coating?
• What is the primary reason for using anti-reflective coatings on lenses?
• For a very tall person, where should the bifocal segment be placed?
• What is indicated if a frame is designed with a retroscopic tilt?
• What should be avoided when fitting glasses to ensure proper alignment?
• When should pantoscopic tilt be reduced?
• What is the corrected lens prescription for a youthful patient with double vision?
• What should be checked if the wearer complains of unequal seg heights?
• Anti-reflective coating of a lens is primarily based on which principles?
• If the front surface of the nose pads cuts into the nose and the back surface does not touch, which angle is likely incorrect?
• What is the primary purpose of measuring segment height in eyewear fitting?
• How can assembled lenses be defined?
• In the boxing system of lens measurement, what does the "B" represent?
• If the segments seem too low, which adjustment can be made?
• Which type of pliers is best for adjusting rocking pad arms?
• Which feature is unique to progressive addition lenses?
• A patient stops in your dispensary for an adjustment of his glasses. If there is too much pantoscopic tilt, to make the necessary adjustment you will:
• What does "add" refer to in a bifocal prescription?
• What is the standard distance between the segments in fused double segment multifocals?
• A ptosis crutch is utilized for supporting which part of the eye?
• A patient wants a uniform tint in their prescription of +8.00 D.S., O.U. The best solution is to use:
• What should a dispenser do if the nose pads are too tight on the wearer's nose?
• A spectacle frame material that is extremely lightweight, will not rust or corrode, and is superior in strength, but tends to be expensive and hard to solder is:
• When measuring a child for bifocals, where should the height of the segment be positioned?
• What should be adjusted if a child's bridge is extremely flat?
• What is true regarding the library temple style?
• When positioning adjustable nose pads, how should they appear from the side?
• What is the correct measurement for the lower edge of a top segment in a double segment lens?
• On which of the following lenses would you perform a bicentric grind on a plastic lens to correct for vertical imbalance at the reading level?
• For individuals with behind-the-ear hearing aids, what is the best design for temples?
• When choosing sunglasses, which feature is most crucial for UV protection?
• What is a common adjustment needed for frames worn by children?
• What is the appropriate way to measure Near PD?
• The difference between measuring the distance and near P.D.'s using a ruler is:
• What defines a cross curve in lens design?
• A person with a short nose may benefit cosmetically from which type of bridge design?
• A temple marked 6 inches is closest in length to which measurement?
• Which lens material typically provides the best impact resistance for children's eyewear?
• For every 2 degrees of pantoscopic tilt, how should the OC be adjusted?
• What should be the immediate action when a consumer complains of severe eye pain?
• Which points define the fitting triangle?
• What essential measurements are required to fit progressive addition lenses properly?
• According to ANSI Standards, what does the "cylinder" define?
• When a frame has retroscopic tilt, what condition does this indicate?
• What is the purpose of a strap bridge in eyewear design?
• If a wearer states that the segment is always in the way, what action should be taken regarding the segment height?
• What is the correct positioning for a properly fitted cable temple?
• How much does one prism diopter displace an image when the object is at a distance of one meter?
• Why is it crucial to provide realistic delivery times for new glasses?
• What effect does wearing high minus lenses in a frame that is too large have on the appearance of the head?
• To ensure that no details are missed when verifying a completed pair of glasses, use:
• What type of lens is specifically designed to correct presbyopia?
• If a patient scratches their new lenses and adds AR coating, what will happen to the scratches?
• Which type of lens is best for someone who does computer work all day?
• When determining the appropriate frame width for eyewear, you should primarily consider:
• A temple that is 5 inches from hinge to bend, and 1.5 inches from bend to tip, would be classified as being:
• What is the effect of bringing the temple length-to-bend down?
• To enhance anti-reflective coatings on lenses, what is typically applied?
• If the eyeglasses settle too low on the wearer's nose, how should the nose pads be adjusted?
• A line drawn parallel to horizontal lines tangent to the lowest and highest edges of a lens is called what?
• In the boxing method of lens measurement, what does the "A" dimension refer to?
• What accessory is commonly used to clean lenses effectively?
• Why might it be necessary to adjust segment height for taller individuals?
• What is a positive aspect of wearing progressive addition lenses compared to standard multifocal lenses?
• In the Boxing System, "eyesize" specifically refers to which measurement?
• In measuring FT trifocals, where is the top of the near segment placed?
• How can keeping written notes during a selling conversation be beneficial?
• What is the designed clear image distance for the intermediate portion of a trifocal?
• If the Rx calls for O.U. +14.00D spheres, which lenses would be the best lightweight option?
• When a patient who is an auto mechanic presents a spectacle prescription, which additional concern should you consider?
• How far above the lower segment line will the lower edge of the top segment of a double seg lens be?
• What is the correct adjustment for a skull temple?
• Which temple style is most suitable for active people?
• Which type of pad is known to be easiest to remove and replace?
• What is the effect of frame fronts with lower endpieces on long faces?
• Which type of lens usually has manufacturer-engraved identification markings?
• What segment style is recommended for a plumber who needs above eye-level close vision?
• What does the fitting triangle represent?
• If a glasses wearer finds the bifocal too high, what is the suggested action?
• What bridge design rests on the sides of the nose without touching the crest?
• What does DBL refer to in optical dispensing?
• What is the name of the temple that can bend down to fit the form of the skull behind the ear?
• To check the bridge size for a frame, which action should be taken?
• Using a lens made of a higher index material for high minus lenses will have what effect on the edge thickness?
• When the pantoscopic angle of a frame is increased, what adjustment must be made regarding the optical centers?
• If the right eye is 2 mm lower than the left eye while measuring heights for a first-time bifocal wearer, what is the best course of action?
• When designing a corrected curve lens, which type of aberration should be avoided?
• In a progressive addition lens, what is the "progressive zone" commonly known as?
• LTB stands for:
• What type of bridge supports the weight entirely on the pads of a plastic frame?
• For a very short person, the segment should be placed where?
• Which type of temples are most comfortable when wearing over-the-ear hearing aids?
• Which tool has spring-loaded retractable jaws for holding small screws in the screwdriver?
• Which temple style holds glasses primarily by applying pressure against the side of the head?
• What indicates that the fitting triangle has proper alignment?
• If the lenses of a patient wearing -15.00 spheres are moved closer to their eyes, what will happen to the effective power?
• Which lens is likely to blur a young emmetrope viewing a distant object?
• What characteristic do most single vision CR-39 lens series share?
• With excessive or unwanted base up prism:
• What will come from bringing the pads too close together?