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[Show more]the wavelength of the infrared waves in the electromagnetic spectrum are CORRECT ANSWER longer than visible red light waves 
 
the Geneva Lens Measure is calibrated for a refractive index of CORRECT ANSWER 1.530 
 
A lens made from 2 convex surfaces CORRECT ANSWER has against motion 
 
A lens reads ...
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Add to cartthe wavelength of the infrared waves in the electromagnetic spectrum are CORRECT ANSWER longer than visible red light waves 
 
the Geneva Lens Measure is calibrated for a refractive index of CORRECT ANSWER 1.530 
 
A lens made from 2 convex surfaces CORRECT ANSWER has against motion 
 
A lens reads ...
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Single Vision CORRECT ANSWER corrects for one distance 
 
Multifocal CORRECT ANSWER Corrects with two or more prescriptions (or 'powers') 
 
Bifocal CORRECT ANSWER lens having two focus strengths 
 
Trifocal CORRECT ANSWER pertaining to having three focus strengths 
 
Calculating Prismatic Effects...
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Add to cartSingle Vision CORRECT ANSWER corrects for one distance 
 
Multifocal CORRECT ANSWER Corrects with two or more prescriptions (or 'powers') 
 
Bifocal CORRECT ANSWER lens having two focus strengths 
 
Trifocal CORRECT ANSWER pertaining to having three focus strengths 
 
Calculating Prismatic Effects...
When discussing thick lenses, the factors which are considered in computing the lens power are: 
 
a. front curve, thickness and index 
b. back curve, thickness and index 
c. front curve, back curve and thickness 
d. front curve, back curve, thickness and index CORRECT ANSWER d. front curve, back cu...
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Add to cartWhen discussing thick lenses, the factors which are considered in computing the lens power are: 
 
a. front curve, thickness and index 
b. back curve, thickness and index 
c. front curve, back curve and thickness 
d. front curve, back curve, thickness and index CORRECT ANSWER d. front curve, back cu...
150 mm - Answer 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 - Answer What is the focal length of a 2 diopter lens? 
A. 500 cm 
B. 39.37 inches 
C. 500 mm 
D. 2 meters 
 
Nanometers ...
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Add to cart150 mm - Answer 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 - Answer What is the focal length of a 2 diopter lens? 
A. 500 cm 
B. 39.37 inches 
C. 500 mm 
D. 2 meters 
 
Nanometers ...
The ability of the eye to focus on objects at different distances - Answer Accommodation 
 
Fresnel optics - Answer Press on prism 
 
Frame material that resist stretching with heat - Answer Nylon 
 
Bridge type that spreads weight over the greatest area - Answer Saddle 
 
Am...
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Add to cartThe ability of the eye to focus on objects at different distances - Answer Accommodation 
 
Fresnel optics - Answer Press on prism 
 
Frame material that resist stretching with heat - Answer Nylon 
 
Bridge type that spreads weight over the greatest area - Answer Saddle 
 
Am...
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 - Answer False 
 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is tha...
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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 - Answer False 
 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is tha...
Sclera - Answer Tough, white outer coat of the eyeball 
 
myopia - Answer nearsightedness; the condition in which parallel rays of light are brought into focus in front of the retina, rather than on it 
 
reflection - Answer light that bounces back 
 
refraction - Answer when...
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Add to cartSclera - Answer Tough, white outer coat of the eyeball 
 
myopia - Answer nearsightedness; the condition in which parallel rays of light are brought into focus in front of the retina, rather than on it 
 
reflection - Answer light that bounces back 
 
refraction - Answer when...
When light is refraction by a prism it is: 
a. Bent toward the apex 
b, Bent toward the base 
c. Not bent 
d. Reflected - Answer B. Bent toward the base 
A prism always bends light toward its base. 
 
Prisms: 
I. Always bend light toward the base 
II. Always bend light toward the apex 
III. Cause...
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Add to cartWhen light is refraction by a prism it is: 
a. Bent toward the apex 
b, Bent toward the base 
c. Not bent 
d. Reflected - Answer B. Bent toward the base 
A prism always bends light toward its base. 
 
Prisms: 
I. Always bend light toward the base 
II. Always bend light toward the apex 
III. Cause...
How do you lower the front of the frame? - Answer 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? - Answer Pressure is being applied by the temple sha...
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Add to cartHow do you lower the front of the frame? - Answer 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? - Answer Pressure is being applied by the temple sha...
What are the three layers of the eye? - Answer Fibrous tunic, vascular tunic, and nervous tunic 
 
What are the five layers of the cornea from anterior to posterior? - Answer Epthelium, Bowmans Membrane, Stroma, Descemets Membrane, Endothelium 
 
What controls the amount of light enterin...
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Add to cartWhat are the three layers of the eye? - Answer Fibrous tunic, vascular tunic, and nervous tunic 
 
What are the five layers of the cornea from anterior to posterior? - Answer Epthelium, Bowmans Membrane, Stroma, Descemets Membrane, Endothelium 
 
What controls the amount of light enterin...
Cancelling effect- subtract prism amounts - Answer BU/BU 
BD/BD 
BI/BO 
 
Powers between 0.00 & +/- 3.00 - Answer Read in 1/8 diopters 
.12 
.37 
.62 
.87 
 
Lensometer is also referred to as - Answer Lensmeter, focimeter, vertometer 
 
To focus eyepiece - Answer 1) while t...
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Add to cartCancelling effect- subtract prism amounts - Answer BU/BU 
BD/BD 
BI/BO 
 
Powers between 0.00 & +/- 3.00 - Answer Read in 1/8 diopters 
.12 
.37 
.62 
.87 
 
Lensometer is also referred to as - Answer Lensmeter, focimeter, vertometer 
 
To focus eyepiece - Answer 1) while t...
Name the scientist who first described the ABO blood group - Answer Karl Landsteiner 
 
State the importance of the ABO blood group in transfusion medicine - Answer Most important system in transfusion. Only system with expected naturally occurring antibodies for antigens not present on ...
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Add to cartName the scientist who first described the ABO blood group - Answer Karl Landsteiner 
 
State the importance of the ABO blood group in transfusion medicine - Answer Most important system in transfusion. Only system with expected naturally occurring antibodies for antigens not present on ...
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 - Answer A) partially reflected, par...
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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 - Answer A) partially reflected, par...
To what does a ptosis crutch give support? - Answer -Upper Lid. 
 
How is a lens' focal LENGTH altered? - Answer -Changing the curvature of one surface. 
 
Which instrument measures vertex distance? - Answer -Distometer. 
 
What controls the amount of light that enters the eye? ...
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Add to cartTo what does a ptosis crutch give support? - Answer -Upper Lid. 
 
How is a lens' focal LENGTH altered? - Answer -Changing the curvature of one surface. 
 
Which instrument measures vertex distance? - Answer -Distometer. 
 
What controls the amount of light that enters the eye? ...
The extra-ocular muscles are inserted into the sclera and serve to rotate the eye in all possible directions. There are_________ of these muscles in each eye. - Answer six 
 
The fibrous tunic is comprised of the: - Answer sclera and cornea 
 
Fusion occurs: - Answer in the brain 
...
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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 in each eye. - Answer six 
 
The fibrous tunic is comprised of the: - Answer sclera and cornea 
 
Fusion occurs: - Answer in the brain 
...
Another name for the lens meter is: - Answer Focimeter 
 
When looking through the eyepiece of the lens meter the 3 thinly spaces lines represent: - Answer Sphere power 
 
When looking through the eyepiece of the lens meter the 3 widely spaces lines represent: - Answer Cylinder Pow...
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Add to cartAnother name for the lens meter is: - Answer Focimeter 
 
When looking through the eyepiece of the lens meter the 3 thinly spaces lines represent: - Answer Sphere power 
 
When looking through the eyepiece of the lens meter the 3 widely spaces lines represent: - Answer Cylinder Pow...
ABO Blood Group System - Answer Marked the beginning of the concept of individual uniqueness defined by RBC antigens in the RBC membrane. 
 
The most important of all blood group system in which individuals predictably have antibodies in their serum to antigens that are absent on the RBC membr...
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Add to cartABO Blood Group System - Answer Marked the beginning of the concept of individual uniqueness defined by RBC antigens in the RBC membrane. 
 
The most important of all blood group system in which individuals predictably have antibodies in their serum to antigens that are absent on the RBC membr...
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