Visual acuity--the ability to discern letters, numbers, and objects from a distance--is essential for many tasks, from recognizing a friend across a room to driving a car. Researchers previously ...

Acuity of vision is a term used to describe the clearness or sharpness of your vision when measured at a distance of 20 feet. ‌ Visual acuity is the most common clinical measurement of how your eyes ...

"Blink and you'll miss it" isn't only for eyelids. The human brain also blinks, dropping a few frames of visual information here and there. Those lapses of attention come fast -- maybe just once every ...