A person can use a mirror to make sure that he is presentable. For example, if a man sees that his tie is crooked, he can straighten it.
يَسْتَخْدِمُ ٱلْمَرْءُ ٱلْمِرْآةَ لِيَتَأَكَّدَ أَنَّ مَظْهَرَهُ لَائِقٌ .‏