In verse 7, John is quoting from Daniel and Zechariah.
# every eye
Since people see with the eyes, the word "eye" is used to refer to people. AT: "every person" or "everyone" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
# including those who pierced him
"even those who pierced him will see him"
# pierced him
Jesus' hands and feet were pierced when he was nailed to the cross. Here it refers to people killing him. AT: "killed him" (See: [[rc://en/ta/man/translate/figs-metonymy]])