美 [ˈsaɪtɪdnəs]
n. 近视；远视
... 精明 = skilled 精明的人 = sightedness 精整 = finishing ...
... mutations（基因的）变异，突变 sightedness 近视 damage 损害，伤害 ...
It is said to combat presbyopia, or age-related long-sightedness.
据说它能对抗老花眼或和年龄有关的远视。
But being born in the summer can have drawbacks - such as an increased risk of short-sightedness.
但是，出生在夏天也有不利之处，比如近视的风险会增大。
And his near sightedness would mean glasses and close monitoring by an ophthalmologist for the rest of his life.
右眼近视就意味着他终身都需要戴眼镜，终身都需要有眼科专家的密切监察。
Uncorrected cases of near-sightedness, far-sightedness and astigmatism are the leading cause of vision problems.
VOA : special.2011.05.16
"I see a lot more children who are coming into the office either because their parents have noticed that they have headaches or red or watery eyes or discomfort, or because their prescription, their near-sightedness, appears to be increasing at a fast rate and they're worried."
VOA : special.2011.08.01
The most common of these are eyestrain, double vision, temporary short-sightedness and visual fatigue.
Leadership and far-sightedness are not general, abstract qualities, but specific to particular tasks and fields and times.
The populism and short-sightedness of its regulators and politicians must not stop California from getting there too.