ABO NOCE Basic Opticianry Dispensing Instrumentation Questions and Answers 5

Question 1

Which type of pliers is preferred for adjusting metal frame temples to avoid surface damage?

Accepted Answer

Smooth-jaw or nylon-tipped pliers

Answer

Smooth-jaw or nylon-tipped pliers prevent scratching and marring of metal frame surfaces during temple and bridge adjustments.

Question 2

When using a digital centration device (e.g., Essilor Visioffice or Rodenstock DNEye), the system captures:

Accepted Answer

3D eye and facial measurements with the frame in place for full fitting data

Answer

Digital centration systems photograph or video the patient wearing the chosen frame and calculate comprehensive fitting data including PD, heights, pantoscopic tilt, and vertex distance simultaneously.

Question 3

The primary purpose of a frame-warmer's temperature setting in dispensing is to:

Accepted Answer

Heat plastic frames to a workable temperature without burning or discoloring them

Answer

Frame warmers maintain a controlled temperature—typically around 120–140°F—so zyl plastic becomes pliable without scorching or color change.

Question 4

In the context of dispensing instrumentation, a seg height stick is used to mark:

Accepted Answer

The desired bifocal or progressive fitting height on the uncut lens or frame

Answer

A seg height stick or ruler is placed against the patient's face with the frame on to mark where the segment top or corridor start should be positioned.

Question 5

When a lensometer reading shows the sphere power is –2.00 D and the cylinder power is –1.00 D, the total power in the minus cylinder meridian is:

Accepted Answer

–3.00 D

Answer

The total power in the most-minus meridian equals sphere plus cylinder: –2.00 + (–1.00) = –3.00 D.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Dispensing Instrumentation Questions and Answers 5