凹おう眼がん鏡きょう

noun

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.

• 凹おう眼がん鏡きょうは近きん視しの矯きょう正せいに用もちいられる。

  Concave glasses are used to correct myopia.