Surah 20. Ta-Ha, Ayah 102

Lit., "blue [of eye]" - i.e., as if their eyes were covered with a bluish, opaque film.

 See footnote for 18:99.

 This can also mean “blind.”

Zurq=having eyes different from the normal colour, which in the East is black and white; having blue eyes, or eyes afflicted with dimness or blindness, or squint; hence mataphorically, blear-eyed (with terror).