noun
pupil dilation; mydriasis
Medical term for abnormal or induced widening of the pupil. Synonym: 散瞳.
See also: 散瞳
瞳孔散大は、暗い場所や特定の薬剤によって起こります。
Pupil dilation occurs in dark places or due to certain medications.
医師は瞳孔散大の有無を確認した。
The doctor checked for the presence of mydriasis.
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.