The eyes represent seeing, and seeing represents thoughts or judgment. AT: "considers themselves pure" or "believes they are pure" (See: [[rc://en/ta/man/translate/figs-metaphor]])
# they are not washed of their filth
The words "washed" and "filth" speak of God forgiving people who sin as if he were washing physical filth off of the people. This can be translated in active form. AT: "God has not forgiven them of their sins" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-activepassive]])