ABO NOCE Basic Opticianry Spectacle Dispensing and Fitting 3

Question 1

The term 'seg height' in progressive addition lenses refers to the measurement from:

Accepted Answer

The bottom of the frame to the fitting cross or pupil center

Answer

Seg height (fitting height) for progressive lenses is measured from the lowest point of the frame to the patient's pupil center or the fitting cross.

Question 2

A patient requests a frame with a very small B measurement. Which lens type will be most problematic to fit in this frame?

Accepted Answer

Progressive addition lens

Answer

Progressive addition lenses require adequate B measurement (vertical height) to accommodate the full progressive corridor from distance to near.

Question 3

When a patient's glasses cause a red mark on the nose, the best immediate adjustment is to:

Accepted Answer

Widen the nose pad spread

Answer

Widening the nose pad spread distributes the frame weight over a larger area, reducing pressure that causes red marks.

Question 4

Pantoscopic tilt is best described as:

Accepted Answer

The downward tilt of the bottom of the lens relative to the top

Answer

Pantoscopic tilt is the vertical angle where the bottom of the frame front tilts toward the face, typically 8–12 degrees for optimal optical performance.

Question 5

For every 2 degrees of pantoscopic tilt added, the optical center should be moved:

Accepted Answer

1mm downward

Answer

For every 2 degrees of pantoscopic tilt, the optical center should be lowered by 1mm to maintain proper optical alignment with the pupil.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Spectacle Dispensing and Fitting 3