FREE ABO-NOCE ANSI Z80.1 Standards and Tolerances Questions and Answers

Question 1

According to ANSI Z80.1 standards, what is the tolerance for sphere power on a single vision lens with a power of +4.50 D?

Accepted Answer

+/- 0.13 D

Answer

+/- 0.06 D

Answer

+/- 0.25 D

Answer

2% of the power

Question 2

What is the ANSI Z80.1 tolerance for cylinder axis for a lens with a cylinder power of -1.75 D?

Accepted Answer

+/- 2 degrees

Answer

+/- 7 degrees

Answer

+/- 5 degrees

Answer

+/- 3 degrees

Question 3

A pair of mounted single vision lenses is inspected. What is the maximum allowable vertical prism imbalance according to ANSI Z80.1 standards?

Accepted Answer

0.33Δ

Answer

1.00Δ

Answer

0.67Δ

Answer

0.50Δ

Question 4

For a lens with a sphere power of +8.00 D, what is the ANSI Z80.1 tolerance for power?

Accepted Answer

2% of the power

Answer

+/- 0.13 D

Answer

+/- 0.25 D

Answer

4% of the power

Question 5

What is the total allowable horizontal prism for a mounted pair of single vision or multifocal lenses?

Accepted Answer

0.67Δ

Answer

0.25Δ

Answer

0.33Δ

Answer

1.00Δ

Question 6

A lens has a specified base curve of +5.00 D. According to ANSI Z80.1, what is the acceptable range for the measured base curve?

Accepted Answer

+4.25 D to +5.75 D

Answer

+4.75 D to +5.25 D

Answer

+4.50 D to +5.50 D

Answer

+4.00 D to +6.00 D

Question 7

What is the ANSI Z80.1 tolerance for cylinder power on a lens with a cylinder of -2.50 D?

Accepted Answer

+/- 0.15 D

Answer

+/- 0.13 D

Answer

+/- 0.25 D

Answer

4% of the power