擦亮眼睛

比喻认清形势，分清是非。

擦亮眼睛cā liàng yǎn jīng

brush up one’s eyes—distinguish the true from the false and not let oneself be duped; heighten (/sharpen) one’s vigilance; keep one’s eyes open (/peeled/skinned/polished); keep one’s weather eye open; remove the scales from sb’s eyes; wipe the dust from sb’s eyes
❍ 必须向人民说明真相。只有这样，他们才会～，学会同谎话作斗争。The people should be told the truth. Only then will their eyes be opened and they will learn to fight against untruth.