Optician License Practice Exam

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• What is the speed of visible light per second in water?
• What type of astigmatism occurs when the vertical focal length is shorter and the axis is within 30° of the 180° Meridian?
• What type of lens causes light to converge?
• What is the purpose of the effective diameter (ED) measurement?
• What type of bridge generally provides a snug fit without covering the entirety of the nose?
• Which phenomenon leads to a decrease in light intensity as it passes through a material?
• What property of a material allows light to pass through it without scattering?
• Which type of bridge is made of translucent plastic for metal frames?
• What type of lenses have a consistent prescription to correct various vision problems for individuals under 40?
• What characteristic of a lens affects both its focal length and image quality?
• What line intersects the mechanical center of a lens pattern horizontally?
• Which component is critical in determining the meridians of a cylinder lens?
• What is the primary material used for making plastic frames, commonly referred to as Zyl or Zylonite?
• In optics, a concave lens is characterized by which of the following properties?
• What does 'retinal focus' refer to?
• What instrument uses polarized light to display strain patterns in materials?
• What is the significance of the proposed working distance in taking PD measurements?
• What condition describes the inability of the eye to focus light correctly due to irregularities in shape?
• In lens design, what is the purpose of choosing the base curve to minimize peripheral aberrations?
• What type of glass contains silver halide crystals that darken in sunlight?
• Which machine is used to replicate a pattern onto plastic sheets?
• What term describes the surface that attaches to the lens to secure it during the surfacing process?
• What is luminosity in relation to light?
• What does a 'pencil of light' refer to?
• Which material, when cold, is more likely to break compared to when it is heated?
• What tool features spring tension jaws designed to hold small screws?
• What is a millimeter grid on a 360 degree protractor used for in the lens centration process?
• What is true about rays that are divergent from a source?
• What occurs when light bends around objects?
• What is measured by the amount that a prism displaces an image?
• What alloy is described as pliable, slender, and very resistant to corrosion?
• What method describes the rectangular box formed by both horizontal and vertical measurements on a lens?
• What term describes the geometric center of the "box" that helps position the lens correctly in the frame?
• In which measurement system would the center line serve as a reference point for other measurements?
• What is a cylinder in lens terminology?
• Which temple type is flexible and features a spiral piece of metal?
• Which temple type is described as flexible, resembling straight-backed but can curve around the ear?
• Which type of lenses require an MRP height measurement?
• What type of reflection occurs from a smooth or polished surface?
• Which process is being conducted when adjusting the outer edge of a lens?
• What is referred to as the steepest curve on a toric surface of a lens?
• What does the "frame center" help establish during the lens fitting process?
• What condition is described as one eye significantly differing in refractive power from the other?
• What is the purpose of hard coat applied to lenses?
• What is a collection of rays diverging from or converging on a single point called?
• What is the purpose of grinding the outer carrier portion of a lenticular lens?
• What do you call the points where the principal planes of a lens intersect the axis?
• What is the primary consequence of light being absorbed by a material?
• What is the speed of light per second in miles?
• How is prism deviating power quantified in optics?
• What material is primarily used for frame fronts, known for being sturdy, slim, and lightweight?
• Which property of light is described by the change in speed as it travels through different media?
• What visual condition is indicated by a difference in the refractive power between the two eyes?
• Which term describes the condition where light focuses at two distinct images instead of one?
• What type of astigmatism occurs when the focal lines are perpendicular to each other?
• What is the process in the production of spectacles that starts with the correct refractive power lenses and ends with completed glasses?
• What is the primary advantage of high-index lenses?
• What is the purpose of Prentice's rule?
• What type of image is formed by converging rays after refraction or reflection?
• What is referred to as 'optical infinity' in optics?
• What is the term for the geometric center of a lens?
• What does the "B measurement" indicate in the context of lens measurement?
• What describes the path of a single photon of light?
• What is defined as the distance between two focal lengths of a toric lens?
• What is the primary function of a Fresnel lens?
• Which type of lenses are made to guard against harmful UV rays?
• What does the notation A + DBL equal when measuring lenses?
• What does the "A measurement" assess in lens fitting?
• What type of lens mounting does not utilize eyewires or nylon cords?
• What is the 'front focal length' in optical terms?
• What is the term for the angle of the nose related to a vertical line when viewed head-on?
• What is the primary element of a mounting component that holds the lenses?
• Which optical phenomenon describes light bending as it passes from one medium to another?
• What is the flatter curve referred to on a toric surface?
• What does the term 'displaced' refer to in optics?
• What is the term for lenses that darken when exposed to UV rays?
• An image that appears to be located at a certain position but is actually formed by diverging rays is called what?
• What formula is used for measuring prism power on lenses at any point?
• What type of lens reduces glare by filtering out horizontal light waves?
• What is the recommended space around the bridge area for an appropriate fit?
• What alternative name is given to the straight-back temple?
• What type of lens is designed to correct astigmatism and has refractive power in one meridian only?
• In optics, what effect does a larger focal length have on the amount of refraction?
• What type of surface is characterized by an outward curvature?
• What is the term used to describe the distance from the back surface vertex of a lens to the secondary focal point?
• Which temple design bends all the way around the ear and down to the earlobe?
• What type of lenses has their tops closer to the face?
• What does bifocal lenses typically include?
• In the frame's imaginary "box," where does an X drawn from two opposite corners indicate?
• What process occurs when light rays travel toward a specific point to create an image?
• What device is essential for holding a block on a lens securely?
• What vertical angle can be observed when looking at an individual's profile?
• What phenomenon occurs when a ray of light changes direction as it enters a different material?
• Which lenses are designed to correct nearsightedness, farsightedness, or astigmatism?
• What occurs when a photon of light enters a material but does not exit?
• What term describes the phenomenon where a ray of light is turned back into the incident material after striking a surface?
• What term is used to describe the distance from the center of the peak or valley of a wave?
• What is meant by 'deviation' in optics?
• Which type of wave motion involves particles traveling perpendicular to the direction of wave propagation?
• What type of astigmatism is characterized by focal lines positioned between 31° and 59° Meridian and between 121° and 149° Meridian?
• What lightweight material can be used for injection molded glasses and requires less heat for adjustments?
• Which three frame mounting types ensure lenses are fixed without eyewires or nylon cords?
• What is the term for the angled edge of a spectacle lens?
• What is diffraction in relation to light?
• What factors should be considered when choosing frames and lenses?
• Which meridian refers to the lens portion with the least power in a spherocylinder lens?
• What bridge type balances the weight of metal frames over the entire nasal area?
• What is the main purpose of the carrier in a lenticular lens?
• What is a hand-held width measuring device called that allows for precise measurements?
• What type of lens surface has positive power?
• What does the ABBE number measure?
• What defines the angle created by a ray of light after refraction relative to the normal?
• What is the term for reducing a semi-finished lens blank to smaller size to facilitate surfacing?
• What types of measurements are essential for fitting lenses properly?
• What is the name of the European system used for measuring lenses and frames from the center line?
• What is the most common alloy used in making eyeglass frames, composed of 63-70% nickel?
• Which of the following describes 'myopia'?
• In Numont mounting, how are the lenses connected to the frame?
• Which mounting type involves a metal reinforcing arm connecting the centerpiece with the endpiece?
• What can be a result of inadequate space around the bridge area of eyewear?
• What is the primary purpose of the corneal reflex pupillometer?
• What is defined as a group of rays divergent from a single point on a light source?
• In optics, which term describes the unit of measurement for prism power?
• How much should the MRP be moved for every 2 degrees of Pantoscoptic tilt?
• Which particle is considered the basic unit of the electromagnetic spectrum?
• What phenomenon occurs when light waves meet and create interference patterns?
• What is the scientific principle called when light travels in a straight line?
• What is a common characteristic of scratch resistant lenses?
• What is an important feature of anti-reflective lenses in low-light situations?
• In which type of astigmatism is the horizontal focal length shorter, and the correcting lens axis is within 30° of the 90° Meridian?
• What is the wave formula that relates velocity, frequency, and wavelength?
• Which term describes the condition in which parallel incident rays of light come to a point focus on the retina?
• What imaginary reference line identifies the orientation of cylinder or spherocylinder lenses?
• Which measurement describes a material’s ability to disperse white light into colors?
• How should the temple length be correctly measured?
• What type of frame combines both metal and plastic materials?
• What type of light rays spread apart as if originating from a point?
• What feature characterizes mirror-coated lenses?
• What lens design aims to reduce the amount of peripheral aberration experienced in eyeglass lenses?
• What device is used to accurately position a lens and mark it with reference lines for lens blocking?
• What type of bridge is commonly found on plastic frames and is suitable for individuals with a short nose?
• Which bridge shape is designed to mirror the shape of the nose and distribute the weight of the frame evenly?
• What happens to light rays when they are refracted through a lens?
• Which type of lens design is often used for aplastic sections in sunglasses?
• What is a common cause of aberrations in lenses?
• What does the term 'segment depth' refer to in lens design?
• In a prism, what is the edge of maximum surface separation opposite the apex called?
• What action would you take to achieve optimal lens polish before finishing the lens?
• What is DBC commonly used to describe in lens fitting?
• What is the role of a marker in the lens production process?
• Which type of lens surface is characterized as having negative power?
• What is another term for the frame pupillary distance measurement?
• What is the effect called when light rays coming together focus at a single point?
• What is the speed of visible light per second in air?
• In a prism, what is the relationship between the angle of incidence and the angle of refraction?
• What characteristic is common to both comfort bridges and strap bridges?
• What options should you provide to your patients regarding lenses?
• What condition is characterized by a refractive error in the eye?
• What could affect the accuracy of the PD measurement?
• What do we call the angle between the incident ray and the perpendicular to the boundary at the point of incidence?
• Which term refers to the ratio of the angles subtended by an object and its image on the retina?
• What are lens aberrations?
• Which characteristic defines a transverse wave as opposed to a longitudinal wave?
• Which of the following is the primary focus of refraction?
• Which type of light rays has a positive vergence?
• What is the purpose of a principal plane in optics?
• What does the "Pattern difference" measurement refer to?
• Which instrument is used to accurately measure pupillary distance?
• The phenomenon where light changes direction as it passes from one medium to another is known as what?
• What is the outer portion of a lenticular lens that does not provide optical use called?
• Which of the following measures is associated with the speed of waves?
• What device is used to hold a lens in place during the edging process?
• What condition denotes poor correctable vision without physical abnormalities?
• What is a high power lens designed to have its prescription power only in the center portion?
• What is irregular astigmatism characterized by?
• What does a power cross depict in lens manufacturing?
• What term refers to the displacement of the lens optical center away from the boxing on datum center of the frame's lens aperture?
• Which measurement is crucial for achieving the optimal fit of the lens into the frame?
• Which material is described as lightweight, hypo-allergenic and behaves differently at various temperatures?
• In a cylinder or spherocylinder lens, what do the two meridians correspond to?
• What type of lens is used to correct hyperopia?
• Which imaginary structures are used to describe refraction in lenses?
• What is the main characteristic of a concave surface?
• What modification should be made if the cheeks touch the bottom of the frames in glasses with pantoscopic tilt?
• What is the longest vertical dimension of the lens segment referred to?
• What type of material is described as a thermoplastic molding material that can be molded under heat?
• What term describes the inward turning of the eyes when focusing on a nearby object?
• What does the Pupil Distance (PD) measurement reflect?
• What is the term for the point of intersection of the axis of a lens or mirror with its surface?
• What does the term 'speed' refer to in the context of waves?
• What occurs when a light ray is turned back into the incident material?
• In optical systems, what is the focal point?
• When is the "C measurement" equal to the "A measurement"?
• Which of the following terms relates to the bending of light as it passes from one medium to another?
• What phenomenon occurs when two waves are out of phase and cancel each other out?
• Which of the following is used to cool and lubricate the lens/grinding wheel interface during grinding?
• What is the term referring to the housing for a screw on a pair of glasses?
• Which temple style curves around the side of the head and mirrors its shape?
• What does the term 'divergence' refer to in optics?
• What ocular condition might anisometropia lead to if not corrected?
• What is the term for the junction point of two nonparallel surfaces of a prism?
• What is the outcome of light traveling from a medium of lower optical density to a medium of higher optical density?
• What term describes the number of waves that pass in one second?
• When light travels through a medium, such as water, how does its speed compare to that in air?
• Which feature is beneficial for prescription lenses to enhance relaxation and reduce eye strain?
• Which of the following materials is most likely to require a higher heat for adjustments?
• What is the proper term for a lens type used for correcting vision in more than one meridian?
• What is defined as an opening or hole that allows a portion of light from a source to enter?
• Which lens coating helps minimize reflections on both the front and back surfaces?
• What is a defining factor of the temple design in riding bow temples?
• Which surface will typically have the least optical distortion in a toric lens configuration?
• What term defines the distance from a point on a wave to the corresponding point on the next wave?
• What type of lenses are specifically designed to reduce glare from surfaces like snow and water?
• What is 'illumination' in optical terms?
• What is the term for the distance between two successive points of a wave?
• What term refers to the point around which a pattern rotates during edging?
• What feature of the temple enables it to balance weight evenly over the head?
• In the context of lens edging, what does 'centrating' specifically refer to?
• What is the characteristic of a comfort cable temple?
• What is the feature of glasses with retroscopic tilt?
• What type of lens configuration is described as having two segments that are 13-14mm apart, one at the top and one at the bottom?
• What is the term for the angle between a ray of light that strikes a surface and the normal to that surface?
• What term describes rays of light that come together to meet at a point?
• Why is it important to consider frame styles when advising patients?
• Which mounting type connects the lenses primarily at the bridge?
• What term describes the least distance from the plane of the endpoints to the point of the curve furthest from this plane?
• What angle is referred to as the Splay Nosepad angle?
• What is the trade name for an edge grinding system that produces a shelf-effect behind the bevel on thick edge lenses?
• What term refers to the inverse of the distance from the observation point to the source?
• What is the primary characteristic of regular astigmatism?
• What is the term for an inward-curved surface in optics?
• Which metal is noted for being lightweight, strong, and hypoallergenic, despite being costly to manufacture?
• What does 'distortion' refer to in relation to lens aberration?
• Which side of the light beam is referred to as the incident side?
• What is the purpose of a screw locking adhesive sealant?
• What should a prescription order typically include?
• Which material is known for being very elastic, especially when placed in water?
• What is the role of a lens in focusing light?
• What term describes the composition of a group of pencils originating from all of the points on a light source?
• Which alloy is primarily known for being resistant to rust and corrosion?
• What is the name of the plane where an astigmatic or toric lens exhibits the least distortion?
• Which type of lenses are known to be very reflective and obscure the wearer's eyes?
• Which characteristic is NOT associated with the concept of centrad?
• What type of lens has its peripheral portion flattened to reduce weight and edge thickness?
• What is the formula for calculating vergence?
• What does convergence measure in terms of light rays?
• Which lens type includes bifocals and trifocals?
• What is it called when two waves interact, potentially either amplifying or canceling each other?
• What is the term used for the angle that should be parallel to the angle of the nose when assessing facial profiles?
• What does the interval of Sturm refer to?
• What act involves positioning a lens to align with prescription specifications?
• What is the name of the horizontal line that spans across a lens?
• Which type of lenses would benefit individuals who struggle with glare and dim lighting?
• What phenomenon describes light bouncing back to its original location and creating a mirror image?
• Which bridge shape is beneficial for enhancing visibility in those with shorter noses?
• What is the best frame material for individuals who are active in sports?
• What is the term for an unequal refractive condition affecting both eyes?
• Which type of lens is most likely to be used for correcting myopia?
• Which phenomenon describes the height of a wave's peak?
• What is the term for the bending of a wave of light when it passes through a very narrow slit or around the edge of an opaque object?
• In which mounting type are lenses fixed at the edge near the nose?
• When would you observe a virtual image in optical devices?
• How is light defined when it travels as a wave?
• Which material is 72% the heaviness of cellulose acetate and is known for its sturdiness and lightweight features?
• What is the vergence of light that is parallel and originating from a distance of 20 feet or more?
• Which condition is characterized by having two different curves on a single refracting surface?
• What is the primary function of the temple length measurement?
• What is 'frequency' in the context of light?
• Which type of astigmatism is defined by consistent relationships between focal points?
• What is the primary use of a focimeter in optics?
• What does the major meridian refer to in lens optics?
• Which device is used to assist with a droopy eyelid by holding the eyelid up?
• What is a fundamental property of all light rays?
• What term describes the prismatic effect that occurs during reading for those with bifocal prescriptions?
• What is the speed of visible light per second in CR-39?