The teacher sent me home with a note for my mother that said I needed to visit the eye doctor because I failed the vision test.

老师送我回家，给我妈妈留了张便条，上面写着我需要去看眼科医生，因为我视力测试不及格。

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The researchers used a machine called an "electroretinogram" to test the field of vision - firing a tiny beam of light at the shark in a darkened tank from all directions.

研究人员利用“网膜电图”机测试视野——在一个黑暗的箱子里从各方位向鲨鱼发射一丝微弱的光。

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Thau said vision is the most important of the five senses when it comes to learning, and she is amazed that parents will skip out on a vision test.

肖说，就学习而言，视力的重要性位居五官之首，家长们居然忽视视力检查，这让她感到很惊奇。

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"You get the vision, then you test it with software, " Borakove said.

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He is now employing a vision test used by the US Air Force which checks the ability to discriminate between white, black and grey - the lack of which is another symptom often seen in chronic ciguatera.

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That decision led to the end of the international one-day careers of test stalwarts Mark Taylor and Ian Healy and left some critics questioning the vision of the selectors, who were looking towards the World Cup.

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