Some authorities will accept 20/40 acuity as a passing minimum
and many driver licensing agencies accept 20/40 as a minimum
standard. If a subject’s occupation demands good vision at the
reading distance but not at Far Point, consider 20/30 as a minimum
score for Near Point and 20/40 as the minimum score at Far Point.
The opposite would apply if visual skills are critical at far but not at
near, as in the case of a crane operator.
SNELLEN EQUIVALENTS