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

For lenses with a vertex power greater than 6.50 D, the tolerance is ±2% of the prescribed power, but for -6.00 D the standard ±0.12 D tolerance applies.

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

ANSI Z80.1 specifies ±3 degrees of axis tolerance when the cylinder power falls between 0.75 D and 1.50 D.

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

ANSI Z80.1 allows a maximum of 0.33Δ of unwanted prism at the distance reference point for lenses up to ±3.37 D.

Question 4

Which ANSI Z80.1 standard governs prescription ophthalmic lenses?

Accepted Answer

ANSI Z80.1-2015

Answer

ANSI Z80.1 specifically covers prescription ophthalmic lenses, including tolerances for power, prism, and optical quality.

Question 5

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

Accepted Answer

±0.12 D

Answer

ANSI Z80.1 specifies ±0.12 D tolerance for the add power of progressive addition lenses.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

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