ABO NOCE Basic Opticianry Frame Adjustment Techniques by Material 2

Question 1

When adjusting a titanium frame's temples, which technique is most appropriate?

Accepted Answer

Bend slowly with fingers or pliers at room temperature without heat

Answer

Titanium is adjusted cold using slow, steady pressure because it has memory properties and applying heat can damage its finish or alter its temper.

Question 2

A patient's zyl (acetate) frame shows whitening at a bend point after adjustment. This indicates:

Accepted Answer

The material was bent while too cool, causing stress fractures

Answer

Whitening or stress marks in acetate indicate the material was bent cold or at an insufficient temperature, creating micro-fractures in the plastic.

Question 3

Which of the following frame materials should NEVER be placed in a salt pan or frame warmer?

Accepted Answer

Optyl

Answer

Optyl is a thermoset epoxy resin that has shape memory—it returns to its original molded shape when heated, so applying heat reverses adjustments rather than aiding them.

Question 4

A patient returns with a metal frame whose nose pads are pressing unevenly. The correct first step is to:

Accepted Answer

Use pad-adjusting pliers to reposition the pad arms symmetrically

Answer

Pad-adjusting pliers allow precise repositioning of metal pad arms to achieve symmetrical, even pressure without damaging the frame.

Question 5

What is the primary reason TR-90 (nylon-based) frames require a different adjustment approach than standard acetate?

Accepted Answer

TR-90 has high flexibility and memory, resisting permanent deformation from heat alone

Answer

TR-90's nylon composition gives it spring-like memory, meaning adjustments may need more force and the frame may partially revert, requiring patient counseling about limitations.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Frame Adjustment Techniques by Material 2