瞳どう孔こう散さん大だい

Meanings

1

noun

pupil dilation; mydriasis

medicine

Medical term for abnormal or induced widening of the pupil. Synonym: 散瞳.

See also: 散瞳

瞳どう孔こう散さん大だいは、暗くらい場ば所しょや特とく定ていの薬やく剤ざいによって起おこります。
Pupil dilation occurs in dark places or due to certain medications.

医い師しは瞳どう孔こう散さん大だいの有う無むを確かく認にんした。

The doctor checked for the presence of mydriasis.

散さん瞳どう
Synonym also meaning pupil dilation; 散瞳 is slightly more common in clinical contexts, while 瞳孔散大 is more descriptive.
縮しゅく瞳どう
Antonym meaning pupil constriction (miosis).

Built from

瞳どう孔こう+散さん大だい

Etymology

Compound of 瞳孔 (どうこう, 'pupil') and 散大 (さんだい, 'dilation, enlargement'). The exact historical derivation is uncertain, but the kanji directly reflect the medical meaning.