Exam (elaborations)
NAO VOLUME 4 QUESTIONS AND ANSWERS WITH VERIFIED SOLUTIONS!
- Module
- Institution
NAO VOLUME 4 QUESTIONS AND ANSWERS WITH VERIFIED SOLUTIONS!
[Show more]
Seller
Follow
StudySet
Reviews received
Content preview
NAO VOLUME 4 QUESTIONS AND ANSWERSWITH VERIFIED SOLUTIONS!
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)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller StudySet. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £9.77. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now