Question

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?
cutting - edge research about myopia
an overview of myopia
the dangers of myopia

Explanation:

The text introduces myopia by defining it, listing its main and other symptoms, its common nickname, prevalence in American adults, and when it typically starts. It provides a general overview rather than focusing on new research or the dangers of the condition.

Answer:

an overview of myopia