ABO NOCE Basic Opticianry Spectacle Dispensing Procedures Questions and Answers 2 — Questions and Answers
Question 1: When adjusting temples for a patient with unequal ear heights, which adjustment corrects the frame tilt?
- Pantoscopic tilt adjustment
- Splay angle modification
- Four-point touch adjustment
- Unequal temple bend heights (Correct answer)
Correct answer: Unequal temple bend heights
Unequal temple bend heights compensate for ears at different vertical levels, leveling the frame on the face.
Question 2: What is the recommended vertex distance for most ophthalmic prescriptions?
- 8 mm
- 10 mm
- 12 mm (Correct answer)
- 14 mm
Correct answer: 12 mm
The standard vertex distance used in ophthalmic prescriptions is 12 mm from the back surface of the lens to the cornea.
Question 3: A patient's frame sits too low on the nose and the lenses ride below the visual axis. The BEST first adjustment is to:
- Increase pantoscopic tilt
- Close the nose pads inward
- Raise the nose pad arms (Correct answer)
- Tighten the end pieces
Correct 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.
Question 4: Which frame measurement describes the horizontal distance between the lenses including the bridge?
- DBL
- ED
- Frame PD (Correct answer)
- A-measurement
Correct 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.
Question 5: A patient complains that their new progressive lenses cause them to tilt their head back to read. This most likely indicates:
- Excessive pantoscopic tilt
- Insufficient pantoscopic tilt (Correct answer)
- Optical centers placed too high
- Excessive face form angle
Correct 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.
Question 6: When dispensing a high minus lens, which frame style minimizes unwanted prismatic effects at the periphery?
- Large eye size with thick plastic frame
- Small eye size with minimal decentration (Correct answer)
- Rimless frame with large lenses
- Wrap-style frame with high face form
Correct answer: Small eye size with minimal decentration
A small eye size with minimal decentration reduces edge thickness and peripheral distortion in high minus prescriptions.
Question 7: The DBL measurement on a frame is BEST defined as:
- Distance between lens centers
- Width of the bridge from lens edge to lens edge
- Distance from nasal edge of one lens to nasal edge of the other (Correct answer)
- Total width of the frame front
Correct 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.
ABO NOCE Basic Opticianry Spectacle Dispensing Procedures Questions and Answers 2
When adjusting temples for a patient with unequal ear heights, which adjustment corrects the frame tilt?