ABO NOCE Basic Opticianry ANSI Z80.1 Standards and Tolerances 2

Question 1

According to ANSI Z80.1, what is the power tolerance for a single-vision lens with a prescribed sphere power of -6.00 D?

Accepted Answer

±0.12 D

Answer

±0.06 D

Answer

±0.13 D

Answer

±0.18 D

Question 2

What is the ANSI Z80.1 tolerance for cylinder axis when the cylinder power is between 0.75 D and 1.50 D?

Accepted Answer

±3 degrees

Answer

±2 degrees

Answer

±5 degrees

Answer

±7 degrees

Question 3

Under ANSI Z80.1, what is the maximum allowable unwanted prism for a lens with a prescribed power of -2.00 D sphere at the distance reference point?

Accepted Answer

0.33Δ

Answer

0.25Δ

Answer

0.50Δ

Answer

1.00Δ

Question 4

Which ANSI Z80.1 standard governs prescription ophthalmic lenses?

Accepted Answer

ANSI Z80.1-2015

Answer

ANSI Z80.3-2015

Answer

ANSI Z80.9-2020

Answer

ANSI Z87.1-2015

Question 5

What is the ANSI Z80.1 tolerance for the add power of a progressive addition lens?

Accepted Answer

±0.12 D

Answer

±0.06 D

Answer

±0.14 D

Answer

±0.25 D

Question 6

According to ANSI Z80.1, what is the cylinder axis tolerance when prescribed cylinder power is greater than 1.50 D?

Accepted Answer

±2 degrees

Answer

±1 degree

Answer

±3 degrees

Answer

±5 degrees

Question 7

Under ANSI Z80.1, the minimum lens thickness for impact-resistant lenses made of glass should be no less than:

Accepted Answer

2.0 mm at the thinnest point

Answer

1.0 mm at the thinnest point

Answer

2.5 mm at the center

Answer

3.0 mm at the center