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ABO (NOCE) Practice

Chapters 1 through 6 Exam *COLMPLETE*

QuestionAnswer
What is the approximate speed of light? 186,000 miles per second
What is the exact speed of light? 186, 282 miles per second
What layer makes up 90% of the Cornea? The Stroma
About how thick is the Cornea at it's center? 0.5 mm
About how many Cones does each Retina Contain 6 million
About how many Rods does each Retina contain? 120 million
What is the index of refraction for the Cornea? 1.37
What is the index of refraction for the Crystalline Lens? 1.42
What 3 layers comprise the Fibrous Tunic (Outer Layer) The Sclera, Cornea, and Limbus
What 3 layers Comprise of the Vascular Tunic (Middle Layer) The Iris, Ciliary body, and the Choroid
What does the Neural Layer consist of? (Inner Layer) The Retina
What is Diplopia? Double Vision
How many muscles move each eye? 6 muscles
What is the term for a functional eye that for some reason becomes a non-seeing eye? Amblyopia
A tendency of the eye deviating inwards Esophoria
When the eye is always inward Esotropia
When the diopter powers are greater than 2.00 diopters between the left and right eye Anisometropia
When the powers in one eye are opposite of the other (I.E. OD = -2.00 OS =+1.00) Antimetropia
The term for Nearsighted Myopia
The term for Farsighted Hyperopia
When both points of light come to focus behind the retina Compound Hyperopic Astigmatism
When one point of light comes to focus on the retina and the other point of light comes to focus in front of the retina Simple Myopic Astigmatism
When both points of light come to focus in front of the retina Compound Myopic Astigmatism
When one point of light comes to focus on the retina and the other point of light comes to focus behind the retina Simple Hyperopic Astigmatism
What does Konia mean? Image
What does Iseikonia mean? Same size images
What is the term for when the eyes focus inward to read? Convergence
What chart is used to evaluate visual acuity at 20 feet or ocular infinity? The Snellan Chart
What is the term for an eye without a crystalline lens or an eye with a crystalline lens that is unusable? Aphakia
What is the name of the chart that checks for near visual acuity? Referred to as the J4 or J2 chart The Jaeger Chart
The device to measure intraocular pressure Tonometer
What is the Ishihara test? Testing Color
What device is used to see the interior of the eye? Ophthalmoscope
What device is used for visual acuity refinement by a series of trial lenses The Phoropter
What is the term for having two differently colored eyes (irises) Heterochromia
If a person has 20/200 or worse for vision, they are considered... Legally Blind
What does NLP stand for? No Light Perception
The refractive power of the average cornea is equal to about ______ diopters. 43.00
The refractive power of the average crystalline lens is about ______ diopters. 17.00
The _______ provides nutrients to the retina and other parts of the eye. Choroid
The ______ provides protection and helps maintain the eye's shape. Sclera
The ____ regulates the amount of light entering the eye by changing the size of the pupil. Iris
The _____ _____ carries impulses from the retina to the brain. Optic Nerve
What are the three spaces (or chambers) of the eye? The Anterior chamber, Posterior Chamber and Vitreous Chamber (or Cavity)
The Cornea consists of ____ distinct layers. Five
What is the first layer of the Cornea? The Epithelium
What is the second layer of the Cornea? Bowman's Membrane
What is the third layer of the Cornea? The Stroma
What is the fourth layer of the Cornea? Descemet's Membrane
What is the fifth layer of the Cornea? The Endothelium
The optic nerve takes a route that includes a crossover area known as the _____ _______ Optic Chiasma
The adjustment of the Crystalline Lens is called _____________ Accomodation
The transparent lens located behind the iris and the pupil is called... The Crystalline Lens
1 meter is equal to _____ inches (in) 39.37
1 inch is equal to ____ millimeters (mm) 25.4
1 meter is equal to __ decimeters 10
1 meter is equal ___ centimeters 100
1 meter is equal to ____ millimeters 1000
Visible light is how many nanometers? 390 to 750
What are the three types of UV (Ultra Violet) A, B and C
What is the most dangerous UV type? C
What UV type causes sunburn and may contribute to cataracts? A
What UV type causes sunburn, corneal burn, retinal damage and cataracts over time? B
Sun light, molten glass, metal and lava are what type of radiation? Infrared
The __________ is the distance from the crest of one wave to the crest of another. Wavelength
The highest point of the wave is call the _____ crest
The lowest point of the wave is called the ______ trough
When rays of light diverge and radiate outwardly in all directions from their source. This is known as... Radiant Energy
The number of times the crest or trough of a wave passes a point in space in a given unit of time is known as the... Frequency
What does CR-39 stand for? Columbia Resin 39
What is the standard index of refraction used in the optical industry? (Also known as the Geneva Standard) 1.53
What is the index of refraction of the Cornea? 1.37
What is the index of refraction of the Crystalline lens? 1.42
What is the index of refraction of the Vitreous Humor? 1.333
What is the index of refraction of Flint Glass? 1.805
When light hits a lens there are 3 things that happen. What are those three things? Absorption, Transmission and Reflection
Light is always bent toward the ____ of a prism. base
What will a prism do? Displace the image to the apex
Two prisms that are placed base to base will form a ____ lens. Plus
Two prisms that are placed apex to apex will form a _____ lens. Minus
Base up prism in a minus lens will produce prism _____ the pupil. below
Base out prism in a minus lens will produce prism _____ in
Base up prism in a plus lens will produce prism _____ the pupil. above
Base out prism in a plus lens will produce prism ___ out
What is the index of refraction for air? 1.00
The power of the prism is equal to the power of the lens in diopters times the amount of decentration in millimieters divided by 10. What is the name of this Formula? Prentice's Rule
The shorter the radius the _______ the curve and the stronger the diopter power is. steeper
The larger the sphere the _______ the curve. flatter
The smaller the sphere the _______ the curve. steeper
A lens that is both concave and convex is known as a ________ lens meniscus
A concave lens is known as a _____ lens minus
A convex lens is known as a ____ lens plus
What is another name for a bi-concave lens? Myodisc
Distortions inherent in any lens with power are known as... Aberrations
What optical tool is used to measure the curvature of a lens and is considered one of the most useful but underrated tools in the optical industry. The Lens Clock
The Lens Clock is calibrated for what index of refraction? (the number not the name) 1.53
True or False: The Lens Clock can check for slab off. True
True or False: The Lens Clock can determine what the lens material is made out of. False
What is the "standard" index of refraction in the optical industry? 1.53
The cylinder is used for the correction of ___________ and can be used by itself or it can be combined with a sphere. astigmatism
What is the name of the term for when the distance of the ocular or back surface of a lens is away from the patient's cornea? Vertex Distance
A +10.00 lens has moved away from a patient's eyes by 5mm. What is the power of the lens for the patient now? +10.50
A -10.00 lens has been moved closer to a patient's eyes by 5mm. What is the power of the lens for the patient now? -10.50
A +10.00 lens has moved closer to a patient's eyes by 5mm. What is the power of the lens for the patient now? +9.50
A -10.00 lens has been moved away from a patient's eyes by 5mm. What is the power of the lens for the patient now? -9.50
What does RVD stand for? Refracted Vertex Distance
What does FVD stand for? Fitted Vertex Distance
True or False: A distometer can accurately measure vertex distance. True
True or False: A distometer can measure lens thickness. False
Vertex distance compensation is mandatory for a spectacle prescription of ______ diopters or greater. +/- 7.00
What is the Base Curve for the power ranges of Plano to +2.00 +6.00
What is the Base Curve for the power ranges of -2.00 to -4.50 +4.00
What is the Base Curve for the power ranges of +5.50 to +8.75 +10.00
In modern medical ophthalmic lenses, ocular curves are always ______ or ________ minus concave
A smaller sphere will have ____ power. more
A larger sphere will have ____ power. less
A flatter base curve will make objects appear _______ than before. smaller
An increase in plus power in the base curve makes objects appear ______ than before. larger
Higher index materials create lenses with natural _______ base curves. flatter
What is the index of rafraction for CR-39 plastic? 1.498
What is the index of refraction of Crown Glass? 1.52
What is the Abbe number of Cr-39? 58
What is the specific gravity of Crown Glass? 2.54
What is the specific gravity of CR-39? 1.32
What is the Abbe number for Crown Glass? 58
What is the index of refraction for Polycarbonate? 1.59
What is the specific gravity of Polycarbonate? 1.20
What is the Abbe number for Polycarbonate? 31
What does Aspheric mean in the optical world? non-spherical
Bicentric grinding or "____ ___" is one way to correct for vertical imbalance slab off
"____________ ____ ___" is always ground base up on the lens with the most minus or at least plus power in the 90 degree meridian. Conventional Slab Off
What does "PD" stand for? Pupillary Distance
The average person's eyes will converge _ to _ mm inward to read 3 to 6
"_________ __" is the distance from the center of the bridge of the nose to the center of each pupil. The right eye is recorded first then the left eye. (example: 33/34) Monocular PD
What does OCHt stand for? Optical Center Height
Bifocals and Trifocals need _______ height. segment
Progressives lenses need _________ OCHt monocular
"_______ ______" is measured from the lower eyelid to the deepest B portion of the eye wire. Segment Height
"_____ _______" bend down behind the ear and follow the contour of the skull, resting evenly against it. Skull Temples
"_______ _______" generally straight and hold the spectacles on primarily by pressure against the side of the head. Library Temples
"______ ___ _______" curve around the ear and extend to the level of the ear lobe. They are often used in both children's frames and safety eyewear. Riding Bow Temples
"___________ _______" can be used either as library or skull temples depending on the manner in which they are bent. Convertible Temples
An imaginary line is drawn through the middle of the eyewire both in the horizontal and vertical planes. What is the name of this process? The Datum System
An imaginary box is drawn around the are to be measure. What is the name of this process? The Box System
Horizontal measurement of the box enclosing lens area, also known as the eye size. What is the name of this measurement? A
The least distance between the two lenses. This is known as the... DBL
Vertical measurement of the box enclosing lens area. What is the name of this measurement? B
The difference between the horizontal and vertical measurements is known as the... Frame Difference
Twice the distance from the geometrical center of the lens to the bevel farthest away from it. This is known as the... Effective Diameter
The width of the lens along the central datum line. This is known as what measurement? C
The measurement from the center of the barrel to the middle of the bend is called the ______ __ ____. length to bend
The amount of ____________ required in each eyeis equal to the (GCD - PD)/2 decentration
It is necessary to calculate ________ ____________ when determining where the line or fitting cross of a multifocal lens is positioned relative to the datum line of the frame. vertical decentration
Name this frame material: Epoxy material. Light in weight, cannot be overheated or burned and will not shrink. Optyl
Name this frame material: Originally the most used material for frames, it is a cotton/wood flak product and can be produced in a great variety of colors, textures and patterns. Zyl
Name this frame material: Synthetic material made from coal, water and air. Light in weight and very strong. Often used in childrens frames. Nylon
What are the two types of materials frame are made of? Metal and Plastic
Name this frame material: Noncorrosive, strong and light in weight. Often used in temples. Stainless Steel
Name this frame material: Light in weight, long lasting, may be anodized allowing for many variations in color. Aluminum
This face shape can wear most frames well. Oval
This face shape should wear relatively narrow frames preferably with high temple attachments. Round
This face shape should wear a deep frame, preferably with low temple attachments. Oblong
For ___________ wearers: Frames with adjustable nose pads or minimal vertex distance. Slight face form and avoid radical nasal cutaways. progressive
For ________: Safety is the first and foremost consideration. A well fit bridge and spring hinges for flexibility. children
For ______: Lenses must be 3.00mm thick. "Z87" markings on each temple and the frame front. safety
A well fit frame will come in contact with the wearer only at the following three points known as the _______ ________ fitting triangle
There should be 8-10 degrees of ___________ ____ for most frames. pantoscopic tilt
Less commonly, when the pupil is positioned directly behind the optical center, an ___________ ____ is recommended. orthoscopic tilt
In the very unusual situation where the pupil is positioned below the optical center of the lens, a ___________ ____ is called for. retroscopic tilt
Most frames will have some ________ face form. positive
The need to apply ________ face form can usually be avoided with more appropriate frame selection. negative
Left lens is farther out - Bend left end piece ___ out
Left lens is farther in - Bend left end piece ___ in
Increase pantoscopic angle - Bend both temples or end pieces ___ down
Decrease pantoscopic angle - Bned both temples or end pieces ___ up
The __________ is the single most important and most frequently used instrument in the optical dispensary. lensometer
The lensometer may also be refered to as a _________ or a vertometer. focimeter
True or False: A lensometer is capable of measuring lens thickness. False
True or False: A lensometer is capable of measuring the amount of prism in a lens. True
True or False: A lensometer is capable of measuring the direction of prism base. True
True or False: A lensometer is capable of determining the lens material. False
When verifying a lens from a known prescription what is the first step to do before positioning a lens in the lensometer? Focus the eyepiece
What is the Latin term for Right Eye? Oculus Dexter
What is the Latin term for Left Eye? Oculus Sinister
The lensometer reticle measures for ____ prism
Quadrant 2 in OS is Base ___ or ___ in or up
Quadrant 3 in OD is Base ___ or ___ out or down
Quadrant 4 in OS is Base ___ or ___ out or down
Quadrant 1 in OS is Base ___ or ___ out or up
Quadrant 1 in OD is Base ___ or ___ in or up
Quadrant 4 in OD is Base ___ or ___ in or down
A _______ _____ traces the eye wire and makes a pattern. pattern maker
A ______ _______ blocks the lenses and can affix a chuck. layout blocker
"___ ______" - cut certain plastic lenses, especially polycarbonate. Dry Edgers
"___ ______" - not meant to cut polycarbonate lenses. Wet Edgers
A ____ _____ cuts lenses, reduces bevel, removes sharpness on a safety bevel. Hand Edger
A ______ _____ will create a groove in the edge of the lens. Groove Maker
A _____ _____ creates holes in the lenses for rimless frame styles. Drill Press
What does HMO stand for? Health Maintenance Organization
What does PPO stand for? Preferred Provider Plan
What does EPO stand for? Exclusive Provider Plan
What can not be dispensed or used past their expiration date and are regulated by the FDA? Contact Lenses
What does ANSI stand for? American National Standards Instiute
What does FDA stand for? Food and Drug Administration
Managed care Medicare Providers must retain records for ___ years. 10
The traditional statute of limitations was set at ___ or more years, depending on state law. 3
HIPAA and CMS requires records to be retained for ___ years after the closure of the cost report. 5
HIPAA requires a covered entity, such as a physician billing medicare, to retain required documentation for ___ years from the date of its creation or the date when it was last in effect, whichever is later. 6
What does FMLA stand for? Family Medical Leave Act
What is the size of the steel ball used in the drop test to test standard lenses? 5/8 inch
What is the size of the steel ball used in the drop test to test safety lenses? 1 inch
At what height is used to drop the steel ball in the drop test? 50 inches
Created by: burukkusu