童鞋们表想当然……
看词典：
麦克米兰英语词典 - American
eyesight
eye·sight / `a?,sa?t / noun [uncount]
the ability to see:
My eyesight is really bad.
Reading in poor light can damage your eyesight.
剑桥高级学习词典
eyesight
eyesight /?a?.sa?t/
noun [U]
the ability to see:
good/bad/poor eyesight
You need to have your eyesight tested.
海词在线词典
eyesight ['aisait;'ai?sait]
n. 视力
例句:
His eyesight is failing.
他的视力渐渐衰退了。
His bad eyesight exempted him from military service.
他因视力不好而免服兵役。
His eyesight is becoming progressively worse.
他的视力越来越差。
你看，有了字典，世界还是很美好的……