NAO TEST 4 EXAM QUESTIONS WITH
CORRECT SOLUTIONS||100%
GUARANTEED PASS|| ALREADY A+
GRADED|||UPDATED 2026/2027
SYLLABUS||<<RECENT VERSION>>
HIPAA is the acronym for the _____ of 1996 - ANSWER ✓ health insurance
portability and accountability act
TPO which represents Treatment or Payment or Health care Operations is all of
the following except ____ - ANSWER ✓ FDA
reasonable safeguards mean that a business must take safeguards to protect private
information. one way to remind employees would be ___ - ANSWER ✓ post
notices to employ to maintain patient confidentialty
The amount of reflection of each surface of CR-39 plastic lenses is approximately:
- ANSWER ✓ 4%
The absorption of light in lenses is classified by two variables. What are they? -
ANSWER ✓ Tint and lens transmission
The denser the tint in a lens, the _____: - ANSWER ✓ Less transmission of light
through the lens
Standard transmission in sunlenses should range between: - ANSWER ✓ 15%
and 30%
If a person has exposure to sunlight at least 2 hours or more during the day, their
_____ - ANSWER ✓ Ability to adapt to night vision is compromised if they don't
protect their eyes from the sun exposure
A characteristic of a dark tinted glass lens with an RX of +4.00D sphere would
b_____ - ANSWER ✓ Dark in the center and lighter on the edge
, Given a high plus or minus RX, which lens material would offer the best choice
for uniform density in a sunlens? - ANSWER ✓ cr-39 plastic and trivex
Although this may be the most popular color for sunlenses, it is not recommended
for patients with emerging cataracts: - ANSWER ✓ gray
_____ added to any color increases contrast: - ANSWER ✓ yellow
_____ is better than _____ for improving contrast: - ANSWER ✓ green
Glare is of more concern to which wearer? - ANSWER ✓ cataract patient
_____ are generally inorganic materials (metals or minerals) that are vacuum
deposited to add color on glass lenses to give a uniform density of color on the
lenses: - ANSWER ✓ vacuum color coatings
Which company introduced CR-39 plastic lenses? - ANSWER ✓ PPG Industries
What is the index of refraction of polycarbonate? - ANSWER ✓ 1.59
The quality of today's polycarbonate lenses has been improved due to the demand
of what product? - ANSWER ✓ compact discs
Birefringence is also referred to as _____ and can result in distortion reducing the
visual performance to the wearer? - ANSWER ✓ double refraction
What is the index of refraction of trivex? - ANSWER ✓ 1.53
Features and benefits of trivex include_____: - ANSWER ✓ superior optics,
impact resistance, ultra-light weight (all of the above)
Visible glare can be dangerous because it can not only wash out colors, but in
some instances can cause _____: - ANSWER ✓ photokeratitis
Polarized filters are made by stretching thin sheets of _____ in one meridian: -
ANSWER ✓ polyvinyl alcohol
, Two methods for orienting polarized filters into lenses include - ANSWER ✓
laminating and molding
As light reaches a polarizing filter, _____ - ANSWER ✓ light in only one plane
will pass through, having the other absorbed by the filter, thereby reducing glare
Polarized lenses may not be recommended for which visual task? - ANSWER ✓
any visual task that may include using LCD instrumentation
Photochromic lenses were introduced by _____ in_____ - ANSWER ✓
corning/1964
The color change in photochromic lenses occurs as a result of _____ that are
added to the molten glass: - ANSWER ✓ silver halide crystals
which is not an accurate statement about frame reps? - ANSWER ✓ let your frame
rep help you determine the price you charge
factors influencing darkening/lightening of photochromic lenses include _____ -
ANSWER ✓ all the above- intensity of light, temperature, age of lens
what are ghost images? - ANSWER ✓ dull duplicate images, caused by internal
reflections
which patients would benefit from an AR coating? - ANSWER ✓ all the above-
people who drive at night, people who are bothered by overhead reflections,people
with emerging cataracts
what is the substrate? - ANSWER ✓ underlying lens material
explaining the principles of optical interference, constructive wavelengths are
_____ - ANSWER ✓ lightwaves that are in phase, that build on one another such
as mirror coating
explaining the principles of optical interference, destructive wavelengths are ____
- ANSWER ✓ light waves that are out of phase, that cancel one another, such as
AR coating
CORRECT SOLUTIONS||100%
GUARANTEED PASS|| ALREADY A+
GRADED|||UPDATED 2026/2027
SYLLABUS||<<RECENT VERSION>>
HIPAA is the acronym for the _____ of 1996 - ANSWER ✓ health insurance
portability and accountability act
TPO which represents Treatment or Payment or Health care Operations is all of
the following except ____ - ANSWER ✓ FDA
reasonable safeguards mean that a business must take safeguards to protect private
information. one way to remind employees would be ___ - ANSWER ✓ post
notices to employ to maintain patient confidentialty
The amount of reflection of each surface of CR-39 plastic lenses is approximately:
- ANSWER ✓ 4%
The absorption of light in lenses is classified by two variables. What are they? -
ANSWER ✓ Tint and lens transmission
The denser the tint in a lens, the _____: - ANSWER ✓ Less transmission of light
through the lens
Standard transmission in sunlenses should range between: - ANSWER ✓ 15%
and 30%
If a person has exposure to sunlight at least 2 hours or more during the day, their
_____ - ANSWER ✓ Ability to adapt to night vision is compromised if they don't
protect their eyes from the sun exposure
A characteristic of a dark tinted glass lens with an RX of +4.00D sphere would
b_____ - ANSWER ✓ Dark in the center and lighter on the edge
, Given a high plus or minus RX, which lens material would offer the best choice
for uniform density in a sunlens? - ANSWER ✓ cr-39 plastic and trivex
Although this may be the most popular color for sunlenses, it is not recommended
for patients with emerging cataracts: - ANSWER ✓ gray
_____ added to any color increases contrast: - ANSWER ✓ yellow
_____ is better than _____ for improving contrast: - ANSWER ✓ green
Glare is of more concern to which wearer? - ANSWER ✓ cataract patient
_____ are generally inorganic materials (metals or minerals) that are vacuum
deposited to add color on glass lenses to give a uniform density of color on the
lenses: - ANSWER ✓ vacuum color coatings
Which company introduced CR-39 plastic lenses? - ANSWER ✓ PPG Industries
What is the index of refraction of polycarbonate? - ANSWER ✓ 1.59
The quality of today's polycarbonate lenses has been improved due to the demand
of what product? - ANSWER ✓ compact discs
Birefringence is also referred to as _____ and can result in distortion reducing the
visual performance to the wearer? - ANSWER ✓ double refraction
What is the index of refraction of trivex? - ANSWER ✓ 1.53
Features and benefits of trivex include_____: - ANSWER ✓ superior optics,
impact resistance, ultra-light weight (all of the above)
Visible glare can be dangerous because it can not only wash out colors, but in
some instances can cause _____: - ANSWER ✓ photokeratitis
Polarized filters are made by stretching thin sheets of _____ in one meridian: -
ANSWER ✓ polyvinyl alcohol
, Two methods for orienting polarized filters into lenses include - ANSWER ✓
laminating and molding
As light reaches a polarizing filter, _____ - ANSWER ✓ light in only one plane
will pass through, having the other absorbed by the filter, thereby reducing glare
Polarized lenses may not be recommended for which visual task? - ANSWER ✓
any visual task that may include using LCD instrumentation
Photochromic lenses were introduced by _____ in_____ - ANSWER ✓
corning/1964
The color change in photochromic lenses occurs as a result of _____ that are
added to the molten glass: - ANSWER ✓ silver halide crystals
which is not an accurate statement about frame reps? - ANSWER ✓ let your frame
rep help you determine the price you charge
factors influencing darkening/lightening of photochromic lenses include _____ -
ANSWER ✓ all the above- intensity of light, temperature, age of lens
what are ghost images? - ANSWER ✓ dull duplicate images, caused by internal
reflections
which patients would benefit from an AR coating? - ANSWER ✓ all the above-
people who drive at night, people who are bothered by overhead reflections,people
with emerging cataracts
what is the substrate? - ANSWER ✓ underlying lens material
explaining the principles of optical interference, constructive wavelengths are
_____ - ANSWER ✓ lightwaves that are in phase, that build on one another such
as mirror coating
explaining the principles of optical interference, destructive wavelengths are ____
- ANSWER ✓ light waves that are out of phase, that cancel one another, such as
AR coating
