Imagine a person stands 20 feet away from an eye chart like this one and is able to read all lines perfectly up to (and including) line 6. What can you say about this person's vision?
[mark all correct answers]
a.The person is nearsighted.
b.The person is farsighted.
c.The person has an astigmatism.
d.The person has 20/30 vision.
e.The person has 20/40 vision.
f.The person needs reading glasses.