Question

What is the range of vision of a normal eye?????

Answer 1

A reference value above which visual acuity is considered normal is called 6/6 vision, the USC equivalent of which is 20/20 vision: At 6 meters or 20 feet, a human eye with that performance is able to separate contours that are approximately 1.75 mm apart. If you have 20/20 vision, you can see clearly at 20 feet what should normally be seen at that distance.