FREE NOCE Ophthalmic Products and Materials Questions and Answers

Question 1

A patient who works in a manufacturing plant requires safety glasses.
According to the ANSI Z87.1 standard for high-velocity impact, the lens must resist an impact from a 1/4-inch steel ball traveling at what minimum speed?

Accepted Answer

150 feet per second

Answer

100 feet per second

Answer

200 feet per second

Answer

250 feet per second

Question 2

An optician is explaining the benefits of Trivex lenses to a parent for their child's new glasses. Which of the following sets of properties best describes the advantages of Trivex material?

Accepted Answer

High impact resistance, low specific gravity, and excellent optical clarity (high Abbe value).

Answer

Highest scratch resistance, lowest specific gravity, and highest Abbe value.

Answer

Highest index of refraction, superior tintability, and moderate impact resistance.

Answer

Lowest cost, moderate optical clarity, and highest index of refraction.

Question 3

A patient complains about annoying reflections on their lenses, especially during video calls and when driving at night. Which lens treatment is specifically designed to minimize these reflections and increase the amount of light passing through the lens?

Accepted Answer

Anti-reflective coating

Answer

Photochromic treatment

Answer

Scratch-resistant coating

Answer

UV coating

Question 4

Photochromic lenses darken when exposed to sunlight. What is the primary trigger for this change in modern plastic photochromic lenses?

Accepted Answer

Exposure to ultraviolet (UV) radiation

Answer

Exposure to infrared (IR) radiation

Answer

A change in ambient temperature

Answer

Reaction to visible light intensity

Question 5

When comparing two finished lenses of the exact same power and size, which material property is the primary determinant of the lens's final weight?

Accepted Answer

Specific gravity

Answer

Abbe value

Answer

Index of refraction

Answer

ANSI impact rating

Question 6

A patient with a high plus prescription complains that their current spherical lenses make their eyes look magnified and cause visual distortions at the edges of the glasses. Which lens design would be most effective at reducing these effects?

Accepted Answer

Aspheric design

Answer

Slab-off design

Answer

Atoric design

Answer

Spherical design

A patient who works in a manufacturing plant requires safety glasses.According to the ANSI Z87.1 standard for high-velocity impact, the lens must resist an impact from a 1/4-inch steel ball traveling at what minimum speed?

A patient who works in a manufacturing plant requires safety glasses.
According to the ANSI Z87.1 standard for high-velocity impact, the lens must resist an impact from a 1/4-inch steel ball traveling at what minimum speed?