Acala's eyes, one looking up and the other looking down
Buddhist term referring to the distinctive eyes of the deity Acala (Fudō Myōō), with one eye gazing upward and the other downward, symbolizing compassion and vigilance.
See also: 不動明王 (ふどうみょうおう)
Acala's 'heaven-and-earth eyes' are said to symbolize compassion watching over all beings.