Question

read the text.
a blurry worldview
1 in school, have you ever struggled to see what
the teacher wrote on the board? maybe you
can easily read from a book, but things farther
away—like highway signs—look blurry. this
blurry distant vision is the main symptom of
myopia, a condition that affects about a third
of american adults. if you have myopia, youll
have trouble seeing things far away, but youll
be able to see nearby things clearly. this is
why myopia is commonly called
what is the main focus of the text?
the dangers of myopia
an overview of myopia
cutting - edge research about myopia

Explanation:

The text describes the main symptom of myopia (blurry distant vision), who it affects, and how those with myopia see objects. It does not discuss dangers or research. So it provides an overview of myopia.

Answer:

an overview of myopia