1·But being born in summer can have drawbacks - such as an increased risk of shortsightedness.
但在夏季出生也有一些缺点，比如近视的可能性就比较大。
2·Radical eye surgery promises to cure shortsightedness.
彻底的眼部手术有望治愈近视。
3·Scientists have identified a gene that causes shortsightedness, a discovery which paves the way for treatment to prevent one of the world's most common eye disorders.
科学家们已经发现了导致近视的基因，为治疗这一世界上最常见的眼科疾病奠定了基础。
4·Keeping a dog also has the added benefit that owners are outside more which has been proven to protect against shortsightedness.
养狗的主人需要经常在户外活动，这同时也有助于保护主人的视力，不会近视。
5·We must not go by the shortsightedness of the small producer.
然而这绝不能依靠小生产者的近视。