ABO NOCE Basic Opticianry Dispensing Instrumentation 4

Question 1

An optician uses a digital caliper during the dispensing process primarily to:

Accepted Answer

Precisely measure lens thickness, frame dimensions, or segment heights in millimeters

Answer

Digital calipers provide precise millimeter measurements of lens thickness, frame component dimensions, and other critical physical parameters during dispensing.

Question 2

When using a hand-held magnifier or loupe during frame inspection, an optician is most likely looking for:

Accepted Answer

Surface defects, scratches, or coating imperfections on the lens

Answer

A loupe or magnifier is used to closely inspect lens surfaces for scratches, coating defects, inclusions, or other quality issues before dispensing.

Question 3

The primary purpose of a lens clock (Geneva gauge) in dispensing is to:

Accepted Answer

Measure the sagittal curve (base or front curve) of a lens surface

Answer

The lens clock measures the sagittal depth of a lens surface to determine its curvature (base curve), which is useful for matching replacement lenses.

Question 4

An optician uses a protractor or angle gauge during frame adjustment to measure:

Accepted Answer

Pantoscopic tilt and face form (wrap) angle of the frame

Answer

A protractor or angle gauge measures pantoscopic tilt (vertical frame angle) and face form wrap angle to ensure proper optical alignment.

Question 5

When verifying a plano lens on a lensometer, the mires should appear:

Accepted Answer

Clear and focused at zero power with no cylinder

Answer

A plano lens has no refractive power, so the lensometer mires should focus clearly at zero on the power drum with no cylinder present.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Dispensing Instrumentation 4