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

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

Type of: acuity, sharp-sightedness, visual acuity