1. Normal visual acuity, as measured by the ability to read charts at a distance of 20 feet
   "He had perfect twenty-twenty vision and didn't need glasses";
   - 20/20, 20-20 vision

1. Having normal eyesight
   "He was proud of his twenty-twenty vision";
   - 20/20

Type of: acuity, sharp-sightedness, visual acuity

Encyclopedia: Twenty-twenty