ABO NOCE Basic Opticianry Spectacle Dispensing and Fitting Questions and Answers 5

Question 1

When verifying a finished pair of spectacles with a lensometer, the optician should neutralize the cylinder power by:

Accepted Answer

Rotating the lens until the lines are equal in clarity, then reading the power when lines are focused

Answer

To find cylinder power, rotate the lens until one set of lines is sharp, read that meridian, then rotate 90° for the other meridian; the difference is the cylinder power.

Question 2

A patient with a high-plus prescription complains their glasses feel very heavy on the nose. Which recommendation would MOST effectively reduce this problem?

Accepted Answer

Use a high-index lens material to reduce center thickness

Answer

High-index materials reduce center thickness of plus lenses significantly, directly reducing the lens weight and nose pressure.

Question 3

The American National Standards Institute (ANSI) Z80.1 standard specifies that the allowable tolerance for sphere power in a finished lens (powers above ±6.50 D) is:

Accepted Answer

2% of the stated power

Answer

ANSI Z80.1 allows ±2% of the stated power for lenses with sphere powers greater than ±6.50 D, rather than the fixed tolerance used for lower powers.

Question 4

When fitting wrap-around frames with a prescription, the optician must compensate for frame wrap angle because it introduces:

Accepted Answer

Induced cylinder and sphere power changes

Answer

Lens tilt in wrap-around frames induces oblique astigmatism (cylinder) and changes effective sphere power, requiring compensated lens powers.

Question 5

A patient whose frame sits too low on the nose (segment too high for bifocal) should have the nose pads adjusted by:

Accepted Answer

Moving the nose pads farther apart (widening) to raise the frame

Answer

Widening (spreading) nose pads moves the pads lower on the nose, which raises the frame and thus raises the segment position.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Spectacle Dispensing and Fitting Questions and Answers 5