What visual acuity would you record for a person who can see clearly at 20 feet what an individual with no refractive error sees at 60 feet?

To determine the visual acuity, we use the standard metric that compares a person's vision to that of a person with normal vision (i.e., someone with no refractive error).

In this specific case, if a person can see clearly at 20 feet what a person with normal vision can see at 60 feet, it indicates that their visual acuity is less than ideal. The key here is the ratio of the distances. The numerator (20) represents the distance at which the person with reduced vision can clearly see an object, while the denominator (60) represents the distance at which a person without visual impairment can see the same object clearly.

The calculation for visual acuity is thus expressed as follows: 20 feet (the distance at which the impaired individual can see) compared to 60 feet (the distance for someone with normal vision). This results in a recorded visual acuity of 20/60. The interpretation of this is that the individual must be at 20 feet to see what a person with normal vision can see at 60 feet, reflecting a reduced level of visual acuity.