Legally blind corresponds to which visual acuity?

Legally blind corresponds to which visual acuity?

• A. 20/200
• B. 20/20
• C. 20/40
• D. 20/100

Answer: (A)

Legally blind is defined as having a best-coked vision of 20/200 or worse in the better eye (with correction), or a visual field of 20 degrees or less. The 20/200 ratio means that what a person with normal vision can see from 200 feet away, you can only see from 20 feet away. That level of acuity meets the threshold used to designate legal blindness, which is why 20/200 is the correct match. The other numbers describe better or worse acuity but don’t meet the official threshold: 20/20 is normal, 20/40 indicates mild-to-moderate impairment, and 20/100 is worse than normal but not the standard legal-blind criterion.

Legally blind is defined as having a best-coked vision of 20/200 or worse in the better eye (with correction), or a visual field of 20 degrees or less. The 20/200 ratio means that what a person with normal vision can see from 200 feet away, you can only see from 20 feet away. That level of acuity meets the threshold used to designate legal blindness, which is why 20/200 is the correct match. The other numbers describe better or worse acuity but don’t meet the official threshold: 20/20 is normal, 20/40 indicates mild-to-moderate impairment, and 20/100 is worse than normal but not the standard legal-blind criterion.