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[Show more]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 
 
 
 
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 
 
 
 
Nanometers 
Wavelengths are measu...
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Add to cart150 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 
 
 
 
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 
 
 
 
Nanometers 
Wavelengths are measu...
If the wearer complains of the bifocal line being somewhat in his way when driving, the problem may be alleviated by decreasing the distance between pads. 
 
True or False 
False 
 
 
 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that: 
 
A. T...
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Add to cartIf the wearer complains of the bifocal line being somewhat in his way when driving, the problem may be alleviated by decreasing the distance between pads. 
 
True or False 
False 
 
 
 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that: 
 
A. T...
Sclera 
Tough, white outer coat of the eyeball 
 
 
 
myopia 
nearsightedness; the condition in which parallel rays of light are brought into focus in front of the retina, rather than on it 
 
 
 
reflection 
light that bounces back 
 
 
 
refraction 
when the direction of light changes as it passes...
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Add to cartSclera 
Tough, white outer coat of the eyeball 
 
 
 
myopia 
nearsightedness; the condition in which parallel rays of light are brought into focus in front of the retina, rather than on it 
 
 
 
reflection 
light that bounces back 
 
 
 
refraction 
when the direction of light changes as it passes...
Accommodation 
Focusing of the eye in a near object theough relaxation of the ciliary muscle and thickening of the lens. 
 
 
 
Amblyopia 
The loss of vision without any apparent disease of the eye. 
 
 
 
Ametropia 
A refractive error in which the eye, when in a state of rest, does not focus the im...
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Add to cartAccommodation 
Focusing of the eye in a near object theough relaxation of the ciliary muscle and thickening of the lens. 
 
 
 
Amblyopia 
The loss of vision without any apparent disease of the eye. 
 
 
 
Ametropia 
A refractive error in which the eye, when in a state of rest, does not focus the im...
The ability of the eye to focus on objects at different distances 
Accommodation 
 
 
 
Fresnel optics 
Press on prism 
 
 
 
Frame material that resist stretching with heat 
Nylon 
 
 
 
Bridge type that spreads weight over the greatest area 
Saddle 
 
 
 
Amount of jump image is not affected by 
T...
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Add to cartThe ability of the eye to focus on objects at different distances 
Accommodation 
 
 
 
Fresnel optics 
Press on prism 
 
 
 
Frame material that resist stretching with heat 
Nylon 
 
 
 
Bridge type that spreads weight over the greatest area 
Saddle 
 
 
 
Amount of jump image is not affected by 
T...
the wavelength of the infrared waves in the electromagnetic spectrum are 
longer than visible red light waves 
 
 
 
the Geneva Lens Measure is calibrated for a refractive index of 
1.530 
 
 
 
A lens made from 2 convex surfaces 
has against motion 
 
 
 
A lens reads +4.25D in the vertometer. If t...
Preview 1 out of 3 pages
Add to cartthe wavelength of the infrared waves in the electromagnetic spectrum are 
longer than visible red light waves 
 
 
 
the Geneva Lens Measure is calibrated for a refractive index of 
1.530 
 
 
 
A lens made from 2 convex surfaces 
has against motion 
 
 
 
A lens reads +4.25D in the vertometer. If t...
Corpuscular 
the theory which explains light as a stream of invisible bundles of energy 
 
 
Photons 
the visible bundles of energy 
 
 
Electromagnetic Theory 
The theory which explains light as moving in a series of wave pulsations. 
 
 
186,000 miles per second 
the speed of light in air 
 
 
ray...
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Add to cartCorpuscular 
the theory which explains light as a stream of invisible bundles of energy 
 
 
Photons 
the visible bundles of energy 
 
 
Electromagnetic Theory 
The theory which explains light as moving in a series of wave pulsations. 
 
 
186,000 miles per second 
the speed of light in air 
 
 
ray...
Single Vision 
corrects for one distance 
 
 
 
Multifocal 
Corrects with two or more prescriptions (or 'powers') 
 
 
 
Bifocal 
lens having two focus strengths 
 
 
 
Trifocal 
pertaining to having three focus strengths 
 
 
 
Calculating Prismatic Effects 
obtained at the center of an optical l...
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Add to cartSingle Vision 
corrects for one distance 
 
 
 
Multifocal 
Corrects with two or more prescriptions (or 'powers') 
 
 
 
Bifocal 
lens having two focus strengths 
 
 
 
Trifocal 
pertaining to having three focus strengths 
 
 
 
Calculating Prismatic Effects 
obtained at the center of an optical l...
How do you lower the front of the frame? 
Move nose pads further apart or increase pantoscopic tilt (2 degrees = 1mm) 
 
 
 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that? 
Pressure is being applied by the temple shafts anterior to the ear....
Preview 1 out of 3 pages
Add to cartHow do you lower the front of the frame? 
Move nose pads further apart or increase pantoscopic tilt (2 degrees = 1mm) 
 
 
 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that? 
Pressure is being applied by the temple shafts anterior to the ear....
Which of the following is NOT a characteristic of a Plus Lens: 
A) Magnifies 
B) Real Focal Length 
C) With Motion 
D) Strengthens as Vertex Increases 
C) With Motion 
 
 
 
The weight of the standard dress safety drop ball according to the FDA regulations is: 
A) 72 ounces 
B) 6.5 ounces 
C) 8.7 ou...
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Add to cartWhich of the following is NOT a characteristic of a Plus Lens: 
A) Magnifies 
B) Real Focal Length 
C) With Motion 
D) Strengthens as Vertex Increases 
C) With Motion 
 
 
 
The weight of the standard dress safety drop ball according to the FDA regulations is: 
A) 72 ounces 
B) 6.5 ounces 
C) 8.7 ou...
Change a bifocal Rx to a single vision Rx 
Add the bifocal power to the sphere powers. 
OD: -0.50 
OS: -0.25-0.25x172 
Add: +1.75 
 
Turns into- 
OD: +1.25 
OS: +1.50-0.25x172 
 
 
 
Anisometropia 
There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large ...
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Add to cartChange a bifocal Rx to a single vision Rx 
Add the bifocal power to the sphere powers. 
OD: -0.50 
OS: -0.25-0.25x172 
Add: +1.75 
 
Turns into- 
OD: +1.25 
OS: +1.50-0.25x172 
 
 
 
Anisometropia 
There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large ...
The extra-ocular muscles are inserted into the sclera and serve to rotate the eye in all possible directions. There are _______of these muscles. 
Six 
 
 
 
The fibrous tunic is comprised of the: 
Sclera and cornea 
 
 
 
Fusion occurs: 
In the brain 
 
 
 
The aqueous fluid is continually being man...
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Add to cartThe extra-ocular muscles are inserted into the sclera and serve to rotate the eye in all possible directions. There are _______of these muscles. 
Six 
 
 
 
The fibrous tunic is comprised of the: 
Sclera and cornea 
 
 
 
Fusion occurs: 
In the brain 
 
 
 
The aqueous fluid is continually being man...
To what does a ptosis crutch give support? 
-Upper Lid. 
 
 
 
How is a lens' focal LENGTH altered? 
-Changing the curvature of one surface. 
 
 
 
Which instrument measures vertex distance? 
-Distometer. 
 
 
 
What controls the amount of light that enters the eye? 
-Iris. 
 
 
 
Which word is use...
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Add to cartTo what does a ptosis crutch give support? 
-Upper Lid. 
 
 
 
How is a lens' focal LENGTH altered? 
-Changing the curvature of one surface. 
 
 
 
Which instrument measures vertex distance? 
-Distometer. 
 
 
 
What controls the amount of light that enters the eye? 
-Iris. 
 
 
 
Which word is use...
Cancelling effect- subtract prism amounts 
BU/BU 
BD/BD 
BI/BO 
 
 
 
Powers between 0.00 & +/- 3.00 
Read in 1/8 diopters 
.12 
.37 
.62 
.87 
 
 
 
Lensometer is also referred to as 
Lensmeter, focimeter, vertometer 
 
 
 
To focus eyepiece 
1) while turned off. Place white sheet of paper against ...
Preview 1 out of 4 pages
Add to cartCancelling effect- subtract prism amounts 
BU/BU 
BD/BD 
BI/BO 
 
 
 
Powers between 0.00 & +/- 3.00 
Read in 1/8 diopters 
.12 
.37 
.62 
.87 
 
 
 
Lensometer is also referred to as 
Lensmeter, focimeter, vertometer 
 
 
 
To focus eyepiece 
1) while turned off. Place white sheet of paper against ...
Fibrous Tunic 
Vascular Tunic 
Nervous Tunic 
What three layers are the eye made up of? 
 
 
Fibrous Tunic 
Consists of the sclera and the cornea. 
 
 
Vascular Tunic 
Consists of the iris, the choroid, and the ciliary body and is responsible for nourishment 
 
 
Nervous Tunic 
The inner layer of ph...
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Add to cartFibrous Tunic 
Vascular Tunic 
Nervous Tunic 
What three layers are the eye made up of? 
 
 
Fibrous Tunic 
Consists of the sclera and the cornea. 
 
 
Vascular Tunic 
Consists of the iris, the choroid, and the ciliary body and is responsible for nourishment 
 
 
Nervous Tunic 
The inner layer of ph...
Light falling on the front surface of a spectacle lens is: 
A) partially reflected, partially absorbed and the remainder refracted 
B) partially reflected and the remainder refracted 
C) partially absorbed and the remainder refracted 
D) totally refracted 
A) partially reflected, partially absorbed ...
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Add to cartLight falling on the front surface of a spectacle lens is: 
A) partially reflected, partially absorbed and the remainder refracted 
B) partially reflected and the remainder refracted 
C) partially absorbed and the remainder refracted 
D) totally refracted 
A) partially reflected, partially absorbed ...
When taking seg height measurements, which of the following situations could result in a parallax error? 
Patient sitting/ dispenser standing erect 
 
 
 
Which of the following is not significant in identifying the problem of vertical imbalance? 
Patient's age 
 
 
 
Which of the following element...
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Add to cartWhen taking seg height measurements, which of the following situations could result in a parallax error? 
Patient sitting/ dispenser standing erect 
 
 
 
Which of the following is not significant in identifying the problem of vertical imbalance? 
Patient's age 
 
 
 
Which of the following element...
Visible Spectrum of light 
390 -750 Nanometers 
 
 
 
Long Ultraviolet (UV) Light 
396-400 Nanometers 
 
 
 
Light is always bent towards the _______ of a Prism 
Base 
 
 
 
1 Inch 
25.4 millimeters 
 
 
 
I meter 
39.37 inches 
 
 
 
Wavelength 
The distance between two corresponding parts of a wav...
Preview 1 out of 2 pages
Add to cartVisible Spectrum of light 
390 -750 Nanometers 
 
 
 
Long Ultraviolet (UV) Light 
396-400 Nanometers 
 
 
 
Light is always bent towards the _______ of a Prism 
Base 
 
 
 
1 Inch 
25.4 millimeters 
 
 
 
I meter 
39.37 inches 
 
 
 
Wavelength 
The distance between two corresponding parts of a wav...
bulbar conjunctiva 
Vascular, transparent membrane that covers the white sclera. Protects and lubricants the eyeball 
 
 
 
ciliary body 
Responsible for focusing at near objects. Makes the lens take on a thin/thick shape with muscular power to be able to alter the shape of the lens. Connected with ...
Preview 1 out of 3 pages
Add to cartbulbar conjunctiva 
Vascular, transparent membrane that covers the white sclera. Protects and lubricants the eyeball 
 
 
 
ciliary body 
Responsible for focusing at near objects. Makes the lens take on a thin/thick shape with muscular power to be able to alter the shape of the lens. Connected with ...
This allows dispensers to avoid being directed to a poor decision by a patient who has no optical experience 
control 
 
 
 
A pair of eyeglasses achieves perfection if it succeeds in these three areas: 
good optics, good wearing comfort, and good cosmetics 
 
 
 
The patient has a great deal of ___...
Preview 1 out of 4 pages
Add to cartThis allows dispensers to avoid being directed to a poor decision by a patient who has no optical experience 
control 
 
 
 
A pair of eyeglasses achieves perfection if it succeeds in these three areas: 
good optics, good wearing comfort, and good cosmetics 
 
 
 
The patient has a great deal of ___...
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