ὑπώπιον · hypōpion — LSJ
the part of the face under the eyes, countenance
the part of the face under the eyes, νυκτὶ θοῇ ἀτάλαντος ὑπώπια like night in countenance, i.e. dark, gloomy, Il. 12.463, cf. Hp. Int. 12 (v.l. ὑπόπυα), Philostr. Gym. 48.
II a blow in the face, black eye, any bruise, weal, a bruise on the foot
a blow in the face, black eye, E. Fr. 374, Ar. Ach. 551, V. 1386, Apolloph. 3, Lys. 4.9, etc.: then, any bruise or weal, Thphr. HP 9.20.3, cf. Gal. 12.804; improperly applied to a bruise on the foot, as is shown by the joke in Ath. 3.97f.
2 blot, disgrace
metaph., blot, disgrace, Cic. Att. 1.20.5.
III as a cure for black eyes
a plant, the root of which was bruised and applied as a cure for black eyes, = θαψία, Ps.-Dsc. 4.153.