noun
mydriatic agent; mydriatic drug
Medical term for a drug that dilates the pupil, used in eye examinations or treatment.
眼科で散瞳薬を点眼して眼底検査を受けた。
I had a fundus examination after receiving mydriatic eye drops at the ophthalmologist's.
A miotic agent that constricts the pupil, opposite in effect to 散瞳薬.
Compound of 散瞳 (さんどう, 'mydriasis') + 薬 (やく, 'drug'). The exact historical derivation is uncertain; the spelling is conventionally associated with the medical meaning.