(From Collyrium 2309 glue, fluo,) as they were usually glutinous, or designed to dilute the glutinous discharges. Suppositories, tents, and other things, have been styled collyria from their form; but as they were used whole, or in their proper shape, they were called entire: what were called collyria, without the epithet entire, were finely powdered and applied to the eyes. At present, a collyrium only means a topical medicine for the eyes, called eye water. It differs not from a lotion, but in the term and application.

Collyria made with vegetable infusions and salts that entirely dissolve are more elegant, and agree better with the eyes, than when they contain powders.

Hoffman condemns all acrid, astringent, cooling, drying, and mucilaginous applications to the eyes. Wede-lius observes, that aloes relieves the eyes more than opium; but experience proves this opinion erroneous. After proper evacuations have preceded, two drachms of tincture of opium, mixed with two ounces of rose water, will very often produce considerable relief; or. in some obstinate cases, the tincture of opium may be used alone with success. The usual collyria are either sedative or astringent. The preparations of lead are of the former kind; those of zinc and copper are astringent: each is applicable in different states of the disease. See Ophthalmia.

Collyrium coeruleum. See Cupri Ammoniati Aqua.