未及时矫正的近视，远视和散光是视觉问题的主要诱因。
Uncorrected cases of near-sightedness, far-sightedness and astigmatism are the leading cause of vision problems.
有三个主要类型的屈光不正：近视，远视和散光。
There are three primary types of refractive errors: myopia, hyperopia and astigmatism.
未矫正近视、远视和散光是视力问题的主要原因。
Uncorrected cases of nearsightedness, farsightedness and astigmatism are the leading cause of vision problems.
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