Final answer:
In a visual acuity test, the recorded line is the smallest line on the Snellen chart that a patient can read flawlessly, reflecting their visual acuity.
Step-by-step explanation:
When performing a visual acuity test, the line that is recorded is the smallest line that the patient can read without error. On a Snellen chart, this line would correspond to the patient's visual acuity measurement. For example, if a patient can read the line marked 20/30 without error, it means they can see at 20 feet what a person with normal visual acuity can see at 30 feet. It is this measurement that indicates the visual acuity. Testing visual acuity is crucial for determining whether corrective lenses are needed or if there are changes in vision that could signify underlying health issues.