There’s a good chance you’ve heard of 20/20 vision, but what about 20/40 vision? These measurements are used to describe visual acuity, which refers to how clearly you can see. 20/20 vision is the benchmark for clear, healthy vision. Having 20/40 vision means you can only see objects from 20 feet that someone with 20/20 […]
What Does 20/40 Vision Mean?
