glance at, look at, see
瞧 centers on directing one's eyes briefly or intentionally: glancing at something, looking at it, or seeing it.
瞧 combines 目 (eye) with 焦, which likely contributes the sound and may suggest a focused or intense look. The exact historical development is uncertain.
The eye 目 on the left and 焦 (which can suggest burning or focusing) on the right: imagine your eyes focusing intently to glance at something.
For ショウ, picture a show where you glance at the performers: show -> ショウ, and your eyes 目 are on the stage.