How clearly an individual can see is refereed to as her visual?

How clearly an individual can see is referred to as their visual acuity. This measurement indicates the sharpness or clarity of vision, often assessed using standardized eye charts. Visual acuity can be affected by various factors, including eye health, age, and the presence of refractive errors such as nearsightedness or farsightedness. It is typically expressed as a fraction, with 20/20 vision considered normal.