twenty-twenty

or 20/20

[ twen-tee-twen-tee, twuhn-tee-twuhn-tee ]

adjective

1. Ophthalmology. having normal visual acuity.
2. keenly or acutely perceptive:

   an opinion based on twenty-twenty hindsight.

twenty-twenty

adjective

1. med (of vision) being of normal acuity: usually written 20/20

twenty-twenty

/ twĕn′tē-twĕn′tē /

1. Having normal visual acuity. A person with twenty-twenty vision can see type as small as one-third of an inch at a distance of twenty feet.

Word History and Origins

Origin of twenty-twenty¹

First recorded in 1875–80; extracted from Ophthalmic Manual (1875), by Sir Thomas Longmore, chief medical officer of the British armed forces

Example Sentences

"Nineteen—twenty—twenty-one," the people in the Garden of the Tuileries counted.

From Project Gutenberg