Collyrium of Lead.
Take sugar of lead, and crude sal ammoniac, of each four grains. Dissolve them in eight ounces of common water.
Forty or fifty drops of laudanum may be occasionally added to this collyrium.
Those who chuse may substitute instead of this the collyrium of lead recommended by Goulard; which is made by putting twenty-five drops of his Extract of Saturn to eight ounces of water, and adding a tea-spoonful of brandy.
Indeed, common water and brandy, without any other addition, will in many cases answer very well as a collyrium. An ounce of the latter may be added to five or six ounces of the former; and the eyes, if weak, bathed with it night and morning.
William Buchan
Domestic Medicine 2nd edition 1785