20-20 vision 20-20 vision /ˈtwɛnti twɛnti ˈvɪʒən/

noun

1. Normal visual acuity, as measured by the ability to read charts at a distance of 20 feet  ( 20/20 , twenty-twenty , 20-20 vision )
   normal visual acuity, as measured by the ability to read charts at a distance of 20 feet