Collyrium

In eye care, collyrium is an antique term for a lotion or liquid wash used as a cleanser for the eyes, particularly in diseases of the eye. The word collyrium comes from the Greek κολλύρον, eye-salve.

The same name was also given to unguents used for the same purpose, such as unguent of tutty. Lastly, the name was given, though improperly, to some liquid medicines used against venereal diseases.