ABO NOCE Basic Opticianry Ophthalmic Products and Materials Questions and Answers

Question 1

A lens material's tendency to cause chromatic aberration is quantified by which of the following values?

Accepted Answer

Abbe Value

Answer

Index of Refraction

Answer

Specific Gravity

Answer

ANSI Rating

Question 2

A patient chooses a high-index lens with an aspheric design. What is the primary optical benefit of the aspheric design compared to a standard spherical lens?

Accepted Answer

It reduces peripheral distortions and spherical aberration.

Answer

It provides built-in UV protection.

Answer

It darkens automatically in sunlight.

Answer

It increases the impact resistance of the lens.

Question 3

Which of the following is the primary mechanism that causes plastic photochromic lenses to darken when exposed to sunlight?

Accepted Answer

Organic photochromic molecules change their structure in response to UV radiation.

Answer

Silver halide crystals embedded in the material undergo a chemical reaction.

Answer

A polarized film within the lens activates and blocks more light.

Answer

The anti-reflective coating reverses its properties to absorb light.

Question 4

A pair of industrial safety glasses is marked with "Z87+". What does the "+" signify?

Accepted Answer

The eyewear has passed high-velocity impact testing.

Answer

The lenses are approved for prescription use.

Answer

The eyewear provides protection from chemical splashes.

Answer

The lenses include a UV-protective coating.

Question 5

A customer complains about distracting reflections on their new high-index lenses, especially at night and in photos. Which lens treatment would most effectively address this issue?

Accepted Answer

Anti-reflective coating

Answer

Scratch-resistant coating

Answer

Photochromic treatment

Answer

Polarized film

Question 6

According to FDA regulations, what is the purpose of the "drop ball test" for spectacle lenses?

Accepted Answer

To ensure a minimum level of impact resistance.

Answer

To verify the accuracy of the lens prescription.

Answer

To test the durability of the anti-scratch coating.

Answer

To measure the optical clarity and Abbe value.