Definition of Legal blindness

Reviewed on 3/29/2021

Legal blindness: The criteria used to determine eligibility for government disability benefits and which do not necessarily indicate a person's ability to function. In the US, the criteria for legal blindness are:

  • Visual acuity of 20/200 or worse in the better eye with corrective lenses (20/200 means that a person at 20 feet from an eye chart can see what a person with normal vision can see at 200 feet);


Note that the definition of legal blindness differs from country to country and that the criteria listed above are for the US.


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