NOCE Spectacle Dispensing Procedures 4

Question 1

A hyperopic patient requires +4.00 lenses. To minimize lens thickness, the dispenser should recommend:

Accepted Answer

A frame with a small eye size and a high-index lens material

Answer

Small eye sizes reduce center thickness in plus lenses, and high-index materials reduce thickness further by requiring less curvature for the same power.

Question 2

Which adjustment corrects a frame that causes the lenses to appear tilted nasally downward on the patient's face?

Accepted Answer

Spread the left nose pad and close the right nose pad

Answer

Unequal nose pad adjustment (spreading one side, closing the other) levels and rotates the frame front to correct a nasal tilt.

Question 3

When measuring monocular PDs for progressive lens fitting, the measurement is taken from the center of which anatomical structure?

Accepted Answer

The nasal bridge midline to each pupil center

Answer

Monocular PD is measured from the bridge midline (root of the nose) to the center of each pupil independently.

Question 4

A patient presents with a prescription of OD +2.00 –1.50 × 90 and OS +1.75 –1.25 × 85. When verifying on the lensometer, the optician should verify the cylinder axis is within what ANSI Z80.1 tolerance for this power?

Accepted Answer

±3°

Answer

ANSI Z80.1 allows ±3° axis tolerance for cylinder powers between 0.25 D and 0.50 D (up to 1.50 D cyl), and tighter for higher cylinders.

Question 5

A patient fitted with a new single vision Rx reports blurry vision in primary gaze but clear vision when they tilt their head. This most likely indicates:

Accepted Answer

Optical centers placed too high or too low relative to the pupils

Answer

When OCs are vertically misplaced, the patient involuntarily tilts their head to bring the pupil into alignment with the OC.

NOCE - National Opticianry Competency Examination Practice Test

NOCE - National Opticianry Competency Examination Practice Test

NOCE Spectacle Dispensing Procedures 4