What is the Normal Visual Acuity

Question

What is the normal visual acuity?
A) 20/40
B) 20/30
C) 20/20
D) none of the above

Accepted Answer

Normal visual acuity is considered to be 20/20, meaning that from a distance of 20 feet, a person can see letters or symbols that are 0.1 inches in size. 20/40 and 20/30 indicate that a person can see at 20 feet what a person with normal visual acuity can see at 40 and 30 feet, respectively.