| 单词 | 正常视力 |
| 释义 | 〔blind〕Having a maximal visual acuity of the better eye, after correction by refractive lenses, of one-tenth normal vision or less (20/200 or less on the Snellen test).瞎的，失明的：通过折射矫正后，最好眼最大视力敏感度为正常视力的1/10或少于1/10的（斯奈伦测试20/200)或更低〔correlation〕the positive correlation between cigarette smoking and the incidence of lung cancer; the negative correlation between age and normal vision.吸烟与肺癌发病的正比关系；年龄与正常视力之间的反比关系 |
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