op art
noun [ U ] uk/ˈɒp ˌɑːt/ us/ˈɑːp ˌɑːrt/
欧普艺术，光效应艺术，视幻艺术（一种利用实际上不存在的图形使人产生视错觉的现代艺术）
a type of modern art that uses patterns that do not exist naturally in order to create images that appear to move or to be something that they are not