Frame Adjustment Techniques by Material Flashcards
7 cards from real ABO NOCE Basic Opticianry practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Frame Adjustment Techniques by Material flashcards as text
A beta-titanium (memory metal) temple springs back after every attempt to adjust it. The BEST course of action is to:
Answer: Over-bend the temple slightly beyond the desired angle to compensate for spring-back
Beta-titanium's superelastic memory requires over-correction beyond the target position because the material will spring partway back to its original shape.
Which of the following describes the correct technique for adjusting the end piece angle on an acetate frame to correct facial asymmetry?
Answer: Heat only the end piece area in a frame warmer, then carefully bend the temple at the hinge junction
Localized heating of the end piece softens only that area, allowing the temple angle to be changed at the hinge junction without distorting the rest of the frame.
A patient's nylon (polyamide) frame is adjusted in the office, but by the next day the adjustment has partially relaxed. The optician should explain that:
Answer: Nylon has inherent flexibility and may require follow-up adjustment, and results are often less stable than with acetate
Nylon (polyamide) frames have high elasticity and may gradually creep back toward their original shape, making durable adjustments more challenging than with acetate.
When should a frame warmer be used instead of hot water for softening an acetate frame?
Answer: A frame warmer should be used when the frame has embedded rhinestones or heat-sensitive decorations that water could damage
Hot water can loosen or damage decorative embellishments and certain adhesives; a frame warmer with controlled dry heat is safer for decorated or embellished frames.
An optician is adjusting the vertex distance on a patient's high-plus lens frame by bringing the frame closer to the face. This adjustment is most commonly accomplished by:
Answer: Closing or narrowing the nose pad arms to move the frame forward on the nose
Closing the nose pad arms brings the frame closer to the face, reducing vertex distance, which is particularly important for high-plus lenses where vertex distance significantly affects effective power.
Which of the following describes 'face form angle' (also called wrap or zygomatic angle) in the context of frame fitting?
Answer: The horizontal curve of the frame front that follows the contour of the patient's face
Face form angle (wrap) is the horizontal curvature of the frame front that conforms to the patient's facial contour, which can be increased by gently curving the frame front.
A patient's plastic frame has one lens sitting higher than the other. After checking for frame twist, the optician determines the eye wire itself needs adjustment. The correct approach is to:
Answer: Warm the frame and use angling or 'X-ing' pliers to rotate the low eye wire upward
Warming the plastic and using angling (X-ing) pliers allows controlled rotation of the eye wire to bring the lenses to equal heights without cracking the frame.