Which is a proper way of documenting near visual acuity?

Which is a proper way of documenting near visual acuity?

• A. 1.0/2.0M
• B. 0.5/0.25M
• C. 0.10/1.25M (distance over size)
• D. 0.2/3.0M

Answer: (C)

Near visual acuity is documented using a distance over size format with measurements in M units. The idea is to show how well a person can read at a near distance for a given print size, where the size is expressed in M. In this system, 1 M is the size of print that subtends 5 minutes of arc at 1 meter, so larger M means larger print. So, 0.10/1.25 M means the person can read at near distance with a decimal acuity of 0.10 when the print size is 1.25 M. This follows the standard distance-over-size approach and uses M units to specify the print size. The other options don’t align with this conventional documentation: they pair acuity values with print sizes in ways that don’t reflect the typical near-VA testing format or the logical relationship between acuity and print size.

Near visual acuity is documented using a distance over size format with measurements in M units. The idea is to show how well a person can read at a near distance for a given print size, where the size is expressed in M. In this system, 1 M is the size of print that subtends 5 minutes of arc at 1 meter, so larger M means larger print.

So, 0.10/1.25 M means the person can read at near distance with a decimal acuity of 0.10 when the print size is 1.25 M. This follows the standard distance-over-size approach and uses M units to specify the print size.

The other options don’t align with this conventional documentation: they pair acuity values with print sizes in ways that don’t reflect the typical near-VA testing format or the logical relationship between acuity and print size.