Glossary

• Have a central visual acuity of 20/200 or less in your better eye, even while you are wearing a correcting contact lens or glasses in that eye; or
• Have a limitation in the field of vision of your better eye, so that:
  • You have a contraction of peripheral visual fields to 10 degrees from the point of fixation, or
  • The widest diameter of your visual field subtends an angle no greater than 20 degrees, or
  • You have a contraction of peripheral visual fields to 20% or less visual field efficiency.

Social Security and other agencies use this definition of blindness to decide if you qualify for benefits programs, such as Supplemental Security Income (SSI) and Social Security Disability Insurance (SSDI). Some people with vision impairments that do not meet these standards may still qualify for benefits.