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[Show more]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...
Preview 3 out of 25 pages
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...
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...
Preview 3 out of 23 pages
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...
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 
 ...
Preview 2 out of 12 pages
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 
 ...
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 
 ...
Preview 2 out of 12 pages
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 
 ...
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....
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...
Preview 2 out of 9 pages
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...
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 ...
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