不ふ正せい乱らん視し

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Meanings

1

noun

irregular astigmatism

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

不negative, non-, bad

正correct, justice, righteous

乱riot, war, disorder

視inspection, regard as, see

乱らん視し
General term for astigmatism; 不正乱視 specifies the irregular subtype.
正せい乱らん視し
Regular astigmatism, where the principal meridians are perpendicular; correctable with standard lenses.

Compound of 不正 (irregular) and 乱視 (astigmatism).