sight的反義詞

是blindness ，中文意思是n. 失明無知盲區

The fact is blindness hadn't stopped the children from doing many of the things that sighted children enjoy.總而言之，失明並沒有阻止這些孩子做有視力兒童喜愛做的許多事情。

What exactly is colour-blindness and how do you find out if you have it?

到底什麼是色盲症，你又是怎麼發現自己有色盲症的