N → a nontechnical name for hemeralopia
Scientists in Canada found one beer a day reduced the risk of cataracts – a major cause of blindness in old age.
加拿大的科学家发现每天喝一杯啤酒可以降低得白内障——造成老年失明的主要原因——的风险。
World Sight Day is an annual event that focuses attention on the global problem of blindness and visual impairment.
世界视觉日是一个年度事件，将注意力集中于全球盲症和视力损害问题。
Milton has his hero, Samson, bewailing the fact of his blindness: "o dark, dark, dark, amid the blaze of noon irrecoverably dark, total eclipse without all hope of day!"
弥尔顿描写到自己崇拜的英雄参孙悲叹自己失明：，黑暗，黑暗，黑暗，在正午的光辉中，无法改变的黑暗，黯然的没有一点希望。
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