NAO VOLUME IV Study Guide Exam And Actual Answers.
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Course
NAO
Institution
NAO
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 ...
NAO VOLUME IV Study Guide Exam And
Actual Answers.
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
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