"视力差"英文表达为 "poor eyesight"。
这个词组来源于英语中的 "eye" 和 "sight"，"eye" 指的是眼睛，"sight" 指的是视力。将两个词组合在一起表示的就是视力差。
例句：
"I have poor eyesight so I always wear glasses." (我视力差，所以我总是戴眼镜)
"His poor eyesight made it hard for him to read small print." (他的视力差使得他很难读小字体)
"She was diagnosed with poor eyesight and needs to wear contact lenses." (她被诊断出有视力差，需要佩戴隐形眼镜)