A mutation that led to slightly improved vision benefited the individual in which it first occurred.

导致视力稍微提高这一突变给第一个经历这种突变的个体带来了好处。

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The cockpit and its bubble canopy give the pilot unobstructed forward and upward vision, and greatly improved vision over the side and to the rear.

座舱和水泡形舱盖消除了飞行员的前视和仰视阻碍，并极大的提升了侧视和后视视野。

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Conclusion: Huoxue Huayu intravenous injection treatment of eye contusion hemorrhage significant effect, markedly improved vision after treatment.

结论：活血化瘀针剂静脉注射治疗挫伤性眼内出血效果显著，治疗后视力明显提高。

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Brumberg argues that U.S.support for democracy in the Middle East will advance President Obama's vision of an improved relationship between the United States and Muslim-majority states.

VOA: standard.2010.05.19

Today it is unveiling more data from that Phase III study, showing exactly how much Lucentis improved vision in AMD patients versus a placebo injection.

FORBES: Magazine Article

In a test on ten patients with retinitis pigmentosa, an inherited disease involving retinal degeneration, vision improved significantly.

FORBES: Banishing Blind Spots

Their vision then improved significantly.

BBC: Playing Tetris video game 'fixes lazy eye', doctors say