Film, in farriery, is a thick pellicle or skin, that is formed on the eyes of horses; in consequence of which their sight is impaired.

In order to disperse the film, it has been recommended to reduce common salt and sugar of lead, to a fine powder, and put a little into the eye, so as to corrode the film. Another remedy consists in applying a small quantity of finely pulverized sal ammoniac daily to the part affected, till the obstruction be removed.