Blindness simply means not being able to see, and this can refer to many things. Physical blindness means that you have lost physical sight, but there are other forms as well. If your spouse is cheating and you see the signs but do not admit this fact then your blindness is intention. If you miss work repeatedly then you may be blind to the fact that eventually you will lose your job. Blindness can also refer to an inability to see certain attributes in people.