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

-1.25 D

Answer

+1.25 D

Answer

+3.75 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

Intermediate single vision

Answer

Progressive addition lens

Answer

Bifocal with round seg

Question 3

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

Accepted Answer

Moving the optical center away from the pupil center

Answer

Adjusting the vertex distance

Answer

Changing the lens base curve

Answer

Increasing the pantoscopic tilt

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

56 mm

Answer

20 mm

Answer

38 mm

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

Photochromic coating

Answer

UV coating

Answer

Scratch-resistant coating

Question 6

What is the effect on image size when minus lenses are used?

Accepted Answer

They minify the image

Answer

They magnify the image

Answer

They have no effect on image size

Answer

They distort the image vertically

Question 7

A patient complains that their new single vision lenses cause the floor to appear to tilt. Which measurement error is most likely responsible?

Accepted Answer

Unequal optical center heights

Answer

Incorrect pupillary distance

Answer

Wrong base curve

Answer

Improper lens material selection