Noun: sharp-sightedness 'shaa(r)p'sI-tid-nus
- Sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
"The pilot's sharp-sightedness was tested annually";
- acuity, visual acuity
- Lively attentiveness
"The guard's sharp-sightedness detected the intruder immediately";
- alertness
Type of: attentiveness, sight, vision, visual modality, visual sense