Question

review the text.
so what causes this vision problem? consider how the eye works. when you look at an object, the light rays of that object pass through the outermost layer of the eye (the cornea) and the lens. the cornea and the lens refract, or bend, the light and focus it on the light - sensitive tissue at the back of the eye (the retina). if you have perfect vision, the rays focus directly on the surface of the retina. in a myopic eye, the eyeball is usually too long from front to back. this causes light rays to focus at a point in front of the retina, rather than directly on its surface. this makes distant objects appear blurry.
myopia can also be the result of a cornea that is too curved or a lens that is too thick. for some, myopia is caused by a combination of these problems.
order the key details to create a summary of the text.
more and more people are developing myopia.
myopia is generally caused by light rays focusing in front of the retina, though there are other causes, too.
myopia, or nearsightedness, involves blurry distant vision.
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Explanation:

First, introduce what myopia is (Myopia, or nearsightedness, involves blurry distant vision). Then, explain the cause (Myopia is generally caused by light rays focusing in front of the retina, though there are other causes, too). Finally, mention the trend (More and more people are developing myopia).

Answer:

1. Myopia, or nearsightedness, involves blurry distant vision.
2. Myopia is generally caused by light rays focusing in front of the retina, though there are other causes, too.
3. More and more people are developing myopia.