What is the definition of "legally blind" regarding visual acuity with best corrected lenses?

The definition of "legally blind" in many jurisdictions, particularly in the United States, is established at a visual acuity of 20/200 or worse in the better eye with best corrected lenses. This means that an individual with this level of visual acuity sees at 20 feet what a person with normal vision can see at 200 feet.

In this context, a visual acuity measurement of 6/60 translates to 20/200 when converted from metric to imperial measurement. This indicates that the answer reflects the standard definition of legal blindness as recognized by organizations such as the American Medical Association and the Social Security Administration.

Understanding that other choices present visual acuity levels better than 20/200—such as 20/100 or 20/400—clarifies that these do not meet the established criteria for legal blindness. Recognizing that "legally blind" is a specific characterization of visual acuity helps reinforce the importance of this definition in clinical practice and its implications for patient care and services.