Op art (gajeren fasaha na gani) wani nau'i ne na zane-zane mai ban sha'awa wanda ke amfani da tunanin gani da dabaru na gani don haifar da tunanin motsi ko wasu tasirin gani. Yawanci yana fasalta siffofi na geometric, launuka masu kauri, da manyan alamu masu ƙirƙira ma'anar zurfin, girgizawa, ko bugun zuciya. Op art ya fito a cikin 1960s kuma masu fasaha irin su Bridget Riley, Victor Vasarely, da Richard Anuszkiewicz sun shahara.