noun
Medical term for liquid medication applied to the eyes.
医者から点眼薬を処方された。
The doctor prescribed eye drops for me.
目薬 is the common, everyday word for eye drops, while 点眼薬 is a more formal medical term.
Compound of 点眼 (てんがん, 'instillation into the eye') + 薬 (やく, 'medicine').