John Goodyear’s works are so playful that it’s easy to ignore their seriousness. His show at David Hall Fine Art spans five decades, and from the start he has explored perception by activating the viewer’s eye. His works — call them kinetic paintings, call them Op Art (he was included in “The Responsive Eye,’’ the Museum of Modern Art’s 1965  Op Art survey) — literally move. They shift and turn, their composition constantly changing, and we’re compelled to keep looking.

“Black and Red Movement,” made in 1964, features a zigzag pattern of black on red behind a screen made of vertical black and red slats. Push the screen to the side and it swings, entering into a shimmering, winking dance with the painting beneath. Works such as these — “Rising Blue” is another — are a gas: They’re interactive and they affect a sweet retinal buzz.