Lasik is best for moderate, not severe, vision problems.
镭射视力矫正手术对中等而不严重的视力问题最有效。
Several of the employees in the computer department claim to be developing vision problems from having to stare at a video display terminal for about 7 hours a day.
计算机部门的几名员工声称,由于每天要盯着视频显示终端大约7个小时,他们的视力出现了问题。
Several of the employees in the computer department, for example, claim to be developing vision problems from having to stare at a video display terminal for about 7 hours a day.
例如,计算机部门的几名员工声称,由于每天要盯着视频显示终端大约7个小时,他们的视力出现了问题。
The researchers disagree with the World Health Organization which says blindness and other vision problems are the leading cause.
VOA: special.2009.12.28
The World Health Organization says eighty-five percent of all vision problems could be prevented or cured.
VOA: special.2010.04.27
Uncorrected cases of near-sightedness, far-sightedness and astigmatism are the leading cause of vision problems.
VOA: special.2011.05.16
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