If a person is able to see an object at 20 feet that can be seen at 60 feet by a person with no refractive error, their visual acuity is said to be:

Visual acuity is a measure of the sharpness or clarity of vision and is often evaluated using a standardized visual acuity chart. The numerator in these fractions represents the distance at which the test is performed (usually 20 feet), while the denominator indicates the distance at which a person with normal vision (refractive error-free) can clearly see the same object.

In this case, if a person can see an object clearly at 20 feet that a person with no refractive error can see clearly at 60 feet, this means the individual's visual acuity is limited. The fraction for this individual would be represented as 20 (the distance at which they can see the object) over 60 (the distance at which a person with normal vision can see the same object).

Calculating the visual acuity gives 20/60. This notation reflects that the individual would need to be at 20 feet to see what a person with normal vision could see at 60 feet, demonstrating that their visual capability is less than that of someone with ideal eyesight. A visual acuity of 20/60 indicates a moderate level of visual impairment, where objects are not seen as clearly or at the same distance as would be considered standard for someone with perfect