The nurse is assessing the visual acuity of a client who reports changes in vision. How many feet away from the Snellen chart should the client stand? (Enter a whole number only.)

The standard distance for a visual acuity test using the Snellen chart is 20 feet. This distance allows for an accurate assessment of how well a person can see the details of the letters on the chart, which is a common method used by eye doctors to measure visual acuity.