Visual acuity, often measured using a Snellen chart, quantifies the clarity of vision. A measurement where one can discern details at 20 feet that most individuals can only see clearly at 15 feet indicates superior visual acuity. This implies an ability to resolve finer details at a distance compared to the norm.
Such visual capability can be advantageous in various professions and activities. Pilots, athletes, and those requiring keen observation skills may benefit from heightened visual perception. Historically, achieving better-than-average visual performance has been sought after in fields demanding precision and accuracy.