Left eye radical (Kangxi #109) - the five-stroke pictograph of an eye stood on its short side. Anchors
瞧 in the seeing-and-watching family alongside
看 (look),
睡 (sleep, with closed eye),
眠 (slumber),
眨 (blink),
瞄 (aim). Tells the reader: this character names something the eye does - here, a casual "have a look."