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
When adjusting temples for a patient with unequal ear heights, which adjustment corrects the frame tilt?
Answer: Unequal temple bend heights
Unequal temple bend heights compensate for ears at different vertical levels, leveling the frame on the face.
What is the recommended vertex distance for most ophthalmic prescriptions?
Answer: 12 mm
The standard vertex distance used in ophthalmic prescriptions is 12 mm from the back surface of the lens to the cornea.
A patient's frame sits too low on the nose and the lenses ride below the visual axis. The BEST first adjustment is to:
Answer: Raise the nose pad arms
Raising the nose pad arms elevates the entire frame on the nose, repositioning the optical centers in front of the pupils.
Which frame measurement describes the horizontal distance between the lenses including the bridge?
Answer: Frame PD
Frame PD (or total frame width) is the distance between the outermost edges of the lenses, encompassing both lenses and the bridge.
A patient complains that their new progressive lenses cause them to tilt their head back to read. This most likely indicates:
Answer: Insufficient pantoscopic tilt
Insufficient pantoscopic tilt positions the near zone too high, forcing the patient to tilt their head back to access the reading corridor.
When dispensing a high minus lens, which frame style minimizes unwanted prismatic effects at the periphery?
Answer: Small eye size with minimal decentration
A small eye size with minimal decentration reduces edge thickness and peripheral distortion in high minus prescriptions.
The DBL measurement on a frame is BEST defined as:
Answer: Distance from nasal edge of one lens to nasal edge of the other
DBL (distance between lenses) is measured from the nasal edge of one lens to the nasal edge of the other lens.