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

Apply dry heat with a frame warmer, then bend

Answer

Immerse in hot water before bending

Answer

Use a torch to heat the metal before adjustment

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

The frame was adjusted correctly and color will return

Answer

The frame needs a second round of heating to set the adjustment

Answer

The acetate has oxidized and needs polishing

Question 3

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

Accepted Answer

Optyl

Answer

Zyl (cellulose acetate)

Answer

Stainless steel

Answer

Memory metal (beta-titanium)

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

Replace the nose pads entirely

Answer

Heat the bridge area with a flame to soften the metal

Answer

Advise the patient this cannot be adjusted

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 melts at a lower temperature than acetate

Answer

TR-90 cannot be adjusted at all and must be remade

Answer

TR-90 expands significantly when warmed, distorting the frame shape

Question 6

A stainless steel frame temple needs to be opened slightly for a wider head. The optician should:

Accepted Answer

Use temple-spreading pliers or gently spread the temple by hand at room temperature

Answer

Heat the temple with a frame warmer to 140°F before bending

Answer

Score the metal lightly before bending to prevent cracking

Answer

Immerse the frame in boiling water for 30 seconds

Question 7

When performing a four-point touch alignment check on a frame, you are verifying that:

Accepted Answer

Both temples and both pad arms contact a flat surface simultaneously, confirming the frame is not twisted

Answer

All four screws are tightened equally

Answer

The pantoscopic tilt is set to four degrees on both lenses

Answer

The frame is symmetrical at four measurement points along the bridge