仙呢榕儿
The fact proves that I saw the wrong person (看错人)The fact proves that I misread the word (看错字)The fact proves that I saw it wrongly. ( 看错它了)

早秋2013
我看错了什么? 我看错了人 I saw the wrong person. 我看错了字 I misread the word I saw the wrong word 也可以.