Uncorrected cases of nearsightedness, farsightedness and astigmatism are the leading cause of vision problems.
未矫正近视、远视和散光是视力问题的主要原因。
The light rays will focus either in front of or behind the retina, resulting in "refractive errors" such as nearsightedness, farsightedness and astigmatism.
在光线的重点不是在前面或后面的视网膜，在“屈光不正，如近视，远视和散光”造成的。
Astigmatism frequently occurs with other vision conditions like nearsightedness (myopia) and farsightedness (hyperopia).
散光和近视还有远视一样，都是常见的眼部疾病。
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