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Optician Exam Prep Questions and Answers
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Optician Exam Prep Questions and Answers What is a plastic frame example? Zylonite Zylonite (plastic) Zyl, highly flammable, most commonly used plastic, inexpensive, not hypoallergenic, brittle with age, they come in many colors, harder to make a vertex adjustment Previous Play ...

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  • September 1, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • optician exam prep questions and answers
  • what is a plastic frame example zylonite
  • zylonite plastic zyl highly flammable most com

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  • Optician

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Optician Exam Prep Questions and
Answers
What is a plastic frame example? - answer Zylonite

Zylonite (plastic) - answer Zyl, highly flammable, most commonly used plastic,
inexpensive, not hypoallergenic, brittle with age, they come in many colors, harder to
make a vertex adjustment

Half eye glasses - answer These are for people who need help with a reading
correction but no correction for distance.

Rimless mountings - answer These glasses frame hold the lenses in place only at
their nasal edge.

Optyl (plastic) - answer Inexpensive, easily adjusted, hypoallergenic, brittle with age,
slightly higher in cost, can't adjust nosepad, harder to make a vertex adjustment

Nickel (metal) - answer Inexpensive, easily adjusted, not hypoallergenic,weight,react
with sweat, turning people's frames and their skin green where the frame touches the
face

Titanium (metal) - answer very lightweight, most hypoallergenic material, expensive

Memory metal - answer most flexible, durable, lightweight, expensive, not easily
adjustable

Nylon - answer highly flexible, brittle with age,

Polyamide/copolyamide - answer nylon based material, hypoallergenic,

Grilamid - answer nylon based, usually used for sports and performances, wide
amount of color variety,

Carbon fiber - answer carbon fiber and nylon, can be made thinner,

Polycarbonate - answer used for elastic sports glasses, impact-resistant

Kevlar - answer mixed with nylon, strong and lightweight,

Rubber - answer nylon and rubber

frame front - answer chassis

, Measuring Frames - answer •The eyesize.
•The bridge size.
•The temple length

1 mm = - answer .039 inches

Pupillary Distance - answer distance between the centers of a person's pupils in
millimeters

distance PD - answer the distance between the pupil centers when the person is
looking in the distance

near PD - answer which is the pupil distance when the person is looking close up

Bifocals - answer Little segments placed toward the bottom of the lenses

What do lenses do? - answer They bring an image to a single point of focus at a
desired distance away from the lens.

When does Refraction occur? - answer refraction occurs when images pass through
a material of one index of refraction and into a material of a different index of refraction .

Refracting power - answer how much lens that will refract an image

what are the three ways of changing the refracting - answer 1. Greater the difference
of index in refraction
2. Thicker the lens the greater the refracting ability
3. Changing the curvature

Units of diopters - answer power of lenses

F=1/d - answer F is the power of the lens (diopters) small d means focal point

plus power - answer these lenses bring images to a focus behind the lens

negative power - answer this lens has a focal point in front of the lens and causes
light to disperse instead of come together as it passes through the lens

single vision lens - answer The entire lens is set with one power or focal point.

Trifocal - answer Three distinctive powers: distance reading and intermediate tasks.
Prescribed to people over 40.

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