ABO NOCE Basic Opticianry ABO NOCE MCQ 2

Question 1

A patient's prescription reads +2.50 -1.25 x 090. What is the sphere power of the lens?

Accepted Answer

+2.50 D

Answer

The sphere power is the first number in the prescription notation, which is +2.50 D.

Question 2

Which lens design is best suited for a patient who needs to read music on a stand while playing an instrument?

Accepted Answer

Occupational progressive lens

Answer

Occupational progressives are designed for intermediate-dominant tasks, providing a wider intermediate zone ideal for music stand distances.

Question 3

What does the term 'decentration' refer to in opticianry?

Accepted Answer

Moving the optical center away from the pupil center

Answer

Decentration is the intentional horizontal or vertical displacement of the optical center relative to the frame's geometric center.

Question 4

A frame has a 'B' measurement of 38 mm and a DBL of 18 mm. What is the frame's 'A' measurement needed to calculate minimum blank size?

Accepted Answer

It cannot be determined from B and DBL alone

Answer

The 'A' measurement (lens width) is independent of B (lens height) and DBL (bridge width) and must be measured separately.

Question 5

Which of the following coatings reduces reflections from the back surface of a lens to improve night driving vision?

Accepted Answer

Anti-reflective coating

Answer

Anti-reflective (AR) coating minimizes internal and external reflections, reducing halos and glare especially during night driving.

ABO NOCE Basic Opticianry Practice Test