FREE NOCE Dispensing Instrumentation Usage Questions and Answers

Question 1

An optician is using a manual lensmeter to verify a prescription and notices that the mires are centered only when the lens is positioned 2 mm nasally from the marked pupillary center.
If the lens power is +5.00 D, what is the resulting prismatic effect?

Accepted Answer

1.00Δ Base In

Answer

2.50Δ Base In

Answer

1.00Δ Base Out

Answer

2.50Δ Base Out

Question 2

When using a pupilometer to measure a patient's monocular pupillary distance (PD) for a progressive lens order, what is the correct reference point for the measurement?

Accepted Answer

From the center of the bridge of the nose to the center of the pupil for each eye individually.

Answer

From the center of the bridge of the nose to the temporal limbus of each eye.

Answer

From the center of one pupil to the center of the other pupil.

Answer

From the nasal limbus of one eye to the temporal limbus of the other eye.

Question 3

A dispenser is preparing to adjust a new pair of acetate frames for a patient. Which of the following instruments uses heated glass beads or salt to make the frame material pliable for adjustment?

Accepted Answer

Salt pan

Answer

Hot air frame warmer

Answer

Lens caliper

Answer

Axis pliers

Question 4

While calibrating a manual lensmeter, the first step is to focus the eyepiece. What is the proper procedure to ensure the reticle is correctly focused for the user's eye?

Accepted Answer

Turn the eyepiece fully counter-clockwise to the most plus setting, then slowly turn it clockwise until the reticle first becomes sharp and clear.

Answer

Turn the eyepiece clockwise until the reticle is sharp, then turn it counter-clockwise one full turn.

Answer

Turn the eyepiece fully clockwise, then slowly turn it counter-clockwise until the reticle first becomes sharp.

Answer

Place a high-powered plus lens in the lensmeter and adjust the eyepiece until the target is clear.

Question 5

A patient has a prescription of -12.00 D, which was refracted at a vertex distance of 15 mm. If their chosen frame fits at a vertex distance of 10 mm, what instrument should be used to accurately measure this fitting distance on the patient?

Accepted Answer

Distometer

Answer

Pupilometer

Answer

Geneva lens clock

Answer

Polariscope

Question 6

During the final inspection of a pair of eyeglasses using a manual lensmeter, the target is clear and centered, but the lens marking device seems to be misaligned. Which of the following is the MOST likely consequence of this misalignment?

Accepted Answer

The optical center will be incorrectly dotted on the lens.

Answer

The measured sphere power will be incorrect.

Answer

The axis of the cylinder will be read incorrectly.

Answer

The induced prism will be inaccurate.

An optician is using a manual lensmeter to verify a prescription and notices that the mires are centered only when the lens is positioned 2 mm nasally from the marked pupillary center.If the lens power is +5.00 D, what is the resulting prismatic effect?

An optician is using a manual lensmeter to verify a prescription and notices that the mires are centered only when the lens is positioned 2 mm nasally from the marked pupillary center.
If the lens power is +5.00 D, what is the resulting prismatic effect?