The term “20/20 vision” is used to represent normal visual acuity. Visual acuity is the clarity or sharpness of vision and in this case, is measured at a distance of 20 feet. Thus, if you have 20/20 vision, you can clearly see an object placed 20 feet away. You may have less than 20/20 vision if you have conditions such as nearsightedness, farsightedness, or astigmatism.