During the PPE, a patient is shown to have vision of 20/10. What does this mean?

The vision of 20/10 indicates that the patient can see at 20 feet what a person with normal vision can see at 10 feet. This means that the individual's visual acuity is better than average, allowing them to discern details at a greater distance than what is typical for most people. In the context of a Snellen eye chart, this would mean that the patient is able to read letters that someone with normal vision can only read from a distance of 10 feet, while they are standing 20 feet away from the chart. Therefore, the representation of their vision on the chart corresponds to an exceptional level of acuity, affirming that they have excellent vision capabilities.

This understanding is crucial in the evaluation of an athlete's capability and readiness for sports participation, and it demonstrates that the patient has no need for corrective lenses based solely on this measurement.