Here's an example of legally blind... Higher Standard Deduction for Blindness ... 1. You can't see better than 20/200 in the better eye with glasses

Here's an example of legally blind... Higher Standard Deduction for Blindness ... 1. You can't see better than 20/200 in the better eye with glasses or contact lenses, or 2. Your field of vision is 20 degrees or less. See https://www.irs.gov/pub/irs-pdf/p501.pdf https://www.irs.gov/pub/irs-pdf/p501.pdf I believe 20/200 means you can read only the top letter, E, on vision charts.