מלכים ב ו:יח פירוש: רש״י

And said, “Please strike, etc.” On the curse he did not mention the Name [of God],⁸Because it is not proper that G’s Name be associated with evil and curses. See Bereishis Rabbah 3:6. but for opening [the eyes] he mentioned the Name [of God] on both of them, concerning opening the attendant’s [eyes], and concerning opening the troop’s eyes.

With blindness. A sickness of confusion; one sees, yet does not know what he sees.⁹See Bereishis 19:11.