concave glasses; concave spectacles
Technical term for glasses with concave lenses, used to correct myopia (nearsightedness). Rare in everyday conversation; 近視用メガネ is more common.
Concave glasses are used to correct myopia.
Compound of 凹 (concave) + 眼鏡 (glasses). The reading おうがんきょう follows standard on'yomi readings for the kanji.