⁴ sn The city of Laodicea had a famous medical school and exported a powder (called a “Phrygian powder”) that was widely used as an eye salve. It was applied to the eyes in the form of a paste the consistency of dough (the Greek term for the salve here, κολλούριον, kollourion [Latin collyrium], is a diminutive form of the word for a long roll of bread).