If a person can clearly see an object at 20 feet that would normally be seen at 60 feet by a person with no refractive error, what is their visual acuity?

Visual acuity is measured by comparing an individual's ability to see at a particular distance with what would be expected of a person with normal vision, usually represented as "20/20." In this context, if a person can see an object clearly at 20 feet that a person with normal vision would typically see at 60 feet, their visual acuity is expressed as a ratio of the reference distance (the distance at which they can see the object clearly) to the distance at which a person with normal vision can see the same object clearly.

In this case, the fact that the individual can see clearly at 20 feet when normal vision would allow clear vision at 60 feet indicates that their vision falls short relative to the normal standard. Thus, their visual acuity is documented as 20/60, meaning they see at 20 feet what a person with normal vision can see at 60 feet. This clearly defines the degree of refractive error or other vision deficiency they may have.

The other answers do not apply because they do not correspond to this specific relationship between the distances of vision clarity for the individual and the individual with normal vision. Therefore, the choice of 20/60 accurately reflects the individual's level of visual acuity based on the