The Bible tells us of three different states of blindness. The first and most obvious is that of physical blindness such as Bartimaeus had in Mark 10.
The second is that of spiritual blindness such as Balaam who could not see the Angel blocking his path, or like the two who walked with Jesus on the way to Emmaus, but could not recognize Him as the resurrected Christ.
The third is that of being smitten with spiritual blindness, such as the two angels did to the Sodomites in Genesis 19, and as Elisha did to the Syrians in 2 Kings 6.