ABO NOCE Basic Opticianry Dispensing Instrumentation Questions and Answers 2

Question 1

When using a frame tracer (frame pattern maker), what information is captured for use by an edger?

Accepted Answer

The exact shape (silhouette) of the lens opening, including its size, position, and geometric center

Answer

The prescription power to be ground on the lens

Answer

The patient's PD and OC height

Answer

The lens material and coating specifications

Question 2

An optical bench is used to measure:

Accepted Answer

The focal length and optical properties of lens systems, including back vertex distance and focal power

Answer

The frame pupillary distance

Answer

The lens surface curvature

Answer

The intraocular pressure

Question 3

The purpose of a segment height gauge (seg height ruler) is to:

Accepted Answer

Measure the vertical distance from the lowest point of the lens to the top of the bifocal segment

Answer

Measure the distance between bifocal segments in a pair of lenses

Answer

Measure the patient's near vision PD

Answer

Check the seg width against the prescription

Question 4

What is the function of a spectacle frame warmer (frame heater)?

Accepted Answer

To heat plastic frames to make them pliable for adjustment and lens insertion

Answer

To sterilize frames before fitting

Answer

To soften lens coatings for removal

Answer

To temper glass lenses for impact resistance

Question 5

The purpose of a thickness caliper in opticianry is to:

Accepted Answer

Measure lens center thickness and edge thickness to verify they meet ANSI Z80.1 minimum thickness requirements

Answer

Measure the depth of the frame groove for bevel selection

Answer

Measure the pupillary distance

Answer

Gauge the diameter of the lens blank

Question 6

During lensometer verification, 'base-in' prism is confirmed when the mire target is displaced:

Accepted Answer

Toward the nose (toward the optical center from the nasal side)

Answer

Temporally (toward the ear)

Answer

Inferiorly

Answer

The mire is centered with no displacement