不ふ正せい乱らん視しふせいらんしMeanings1nounirregular astigmatismMedical 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