NOCE - National Opticianry Competency Examination Dispensing Procedures and Instrumentation Questions and Answers

Question 1

A patient wearing progressive addition lenses complains that they have to tilt their head down to see distant objects clearly. Which of the following is the MOST likely cause of this issue?

Accepted Answer

The fitting height is too high.

Answer

The pantoscopic tilt is excessive.

Answer

The pupillary distance (PD) is too narrow.

Answer

The vertex distance is too short.

Question 2

When using a manual lensometer to verify a prescription containing prism, the reticle target is displaced from the center. What is the correct initial procedure to measure the amount and direction of the prism?

Accepted Answer

Use the prism compensating device to bring the target to the center of the reticle.

Answer

Adjust the power drum until the target is centered.

Answer

Rotate the axis wheel until the target is centered.

Answer

Mark the lens at the displaced target location and measure the decentration.

Question 3

Which instrument is considered the gold standard for accurately measuring a patient's interpupillary distance (PD)?

Accepted Answer

A pupilometer

Answer

A millimeter ruler

Answer

A distometer

Answer

A lens clock

Question 4

A patient selects a frame that, when adjusted, will sit 16 mm from their cornea. The original refraction was performed at a vertex distance of 11 mm. The prescription is -9.50 D sphere. What dispensing procedure is critical to ensure the patient experiences the correct lens power?

Accepted Answer

Order the lenses with a compensated power calculation.

Answer

Increase the pantoscopic tilt by 5 degrees.

Answer

Widen the bridge of the frame for a closer fit.

Answer

Use a high-index 1.74 lens material.

Question 5

During the final fitting of a pair of metal-framed spectacles, the dispenser notices the bottom of the frame front is angled too far away from the patient's cheeks. Which adjustment should be made?

Accepted Answer

Increase the pantoscopic tilt.

Answer

Decrease the face form wrap.

Answer

Widen the nose pads.

Answer

Lengthen the temples.

Question 6

Which of the following instruments is used to measure the curvature of the front or back surface of a spectacle lens?

Accepted Answer

Lens Clock (Geneva Gauge)

Answer

Pupilometer

Answer

Lensometer

Answer

Distometer

A patient wearing progressive addition lenses complains that they have to tilt their head down to see distant objects clearly.Which of the following is the MOST likely cause of this issue?

A patient wearing progressive addition lenses complains that they have to tilt their head down to see distant objects clearly.
Which of the following is the MOST likely cause of this issue?