Crossword puzzle clue "scanned through"

to look at and understand written matter

an arrangement, readable by computer, of thick and thin parallel lines, e.g. printed on, and giving coded details of, goods at a point of sale, library books, etc.

BARCODE, an arrangement, readable by computer, of thick and thin parallel lines, e.g. printed on, and giving coded details of, goods at a point of sale, library books, etc.

CASHIER, to dismiss in disgrace

EYE, to watch closely

HORIZON, the line where earth and sky seem to meet