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 nearsightedness. other symptoms of myopia include headaches, eyestrain, and squinting.
2 myopia typically begins in childhood. children often dont realize they are
what is the main focus of the text?
the dangers of myopia
an overview of myopia
cutting - edge research about myopia

Explanation:

The text first describes the main symptom of myopia (blurry distant vision), other symptoms (headaches, eyestrain, squinting), and also mentions that myopia typically begins in childhood. It gives a general introduction to myopia rather than focusing on its dangers (no details about harm like vision loss etc. are given) or cutting - edge research (no mention of new studies or technologies).

Answer:

an overview of myopia