ABO NOCE Basic Opticianry Ophthalmic Products and Materials Questions and Answers 4

Question 1

Which type of progressive addition lens (PAL) design places the corridor in a more nasal position?

Accepted Answer

Soft design PAL

Answer

Soft design PALs distribute power more gradually with the corridor positioned nasally, offering wider intermediate and near zones with less peripheral distortion.

Question 2

Which lens tint color is most effective at enhancing contrast for shooting sports or driving in overcast conditions?

Accepted Answer

Yellow/amber

Answer

Yellow and amber tints enhance contrast by filtering blue light and haze, making them ideal for low-light or overcast conditions.

Question 3

The term 'base curve' in lens manufacturing refers to:

Accepted Answer

The curvature of the front surface of the lens

Answer

The base curve is the curvature of the front (convex) surface of the lens and is used in the lens form equation to determine the back surface curve.

Question 4

A polarized lens provides superior glare protection compared to standard tinted lenses because it:

Accepted Answer

Blocks horizontally polarized reflected light

Answer

Polarized lenses block horizontally polarized light reflected from flat surfaces like water, roads, and snow, which is the primary source of blinding glare.

Question 5

Which standard governs the impact resistance requirements for dress (everyday) ophthalmic lenses in the United States?

Accepted Answer

FDA 21 CFR 801.410

Answer

FDA regulation 21 CFR 801.410 requires that all dress ophthalmic lenses meet impact resistance standards tested by the drop ball method.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Ophthalmic Products and Materials Questions and Answers 4