eyesight
n. 目力，视力
例句
His eyesight is getting dim.
他的视力越来越差。
《牛津词典》
Her eyesight is failing.
她的视力日渐衰退。
He was not a particularly good shot because of his eyesight.
他由于视力缘故并不是一个特别好的射手。
《柯林斯英汉双解大词典》
