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
今日热词
目录 附录 查词历史