Spectacle Dispensing Procedures Questions and Answers 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 Spectacle Dispensing Procedures Questions and Answers flashcards as text
Which adjustment increases the pantoscopic tilt of a metal frame?
Answer: Bending the endpiece to angle the frame bottom away from the face
Bending the endpiece so the bottom of the frame tilts away from the face increases pantoscopic tilt, angling the top of the frame closer to the brow.
When ordering lenses for a rimless mounting, which measurement is MOST critical to provide accurately?
Answer: Exact lens shape and drill hole placement
In rimless mountings, the precise lens shape and drill hole placement are critical because errors cannot be corrected by the frame rim as in full-rim designs.
A patient's progressive lenses show 'swim' (image movement) during lateral gaze. This symptom is MOST commonly associated with:
Answer: Incorrect PD causing improper fitting point alignment
Swim in progressive lenses is frequently caused by incorrect PD, which misaligns the fitting cross and distortion zones relative to the patient's pupils.
What does 'effective diameter' (ED) represent in lens ordering?
Answer: The diameter of the smallest circle enclosing the entire lens shape
Effective diameter is the diameter of the smallest circle that can fully enclose the lens shape, used to determine minimum blank size needed.
A patient with a monocular PD of 35 mm OD and 33 mm OS has their segments decentered. Which eye's segment should be positioned further nasally?
Answer: OS, because the PD is smaller
A smaller monocular PD (OS = 33 mm) means the pupil is closer to the nose, so the segment must be placed further nasally to align with the pupil.
When should an optician perform a vertex distance compensation calculation?
Answer: When sphere or cylinder power exceeds ±4.00 D
Vertex distance compensation is clinically significant when sphere or cylinder power exceeds ±4.00 D, as smaller powers produce negligible effective power changes.
A patient complains their new glasses feel like they are sliding down their nose constantly. After checking the nose pads, the NEXT adjustment to consider is:
Answer: Tightening the skull bend to increase temporal pressure
Tightening the skull bend increases the inward pressure of the temples against the head, which helps prevent the frame from sliding forward and down.