不ふ正せい乱らん視し

noun

irregular astigmatism

Medical term for a type of astigmatism where the corneal curvature is irregular, not correctable by standard cylindrical lenses.

• 不ふ正せい乱らん視しは、角かく膜まくの表ひょう面めんが不ふ規き則そくなために起おこります。

  Irregular astigmatism occurs because the surface of the cornea is irregular.