From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
To make a Blind Horse See again. (From a Turkish Horse Doctor.)
Take a fish called asche, and make an oil of it, which is done in the following manner: procure a new earthen pot, holding half a quart, and put it upon another pot holding but a pint. These inter so that they keep on top of each other, and the one above stands over, and projecting above the ground. Seal hermetically so that no air can get in; but in the bottom must be five holes, so as to permit the oil to run into the lower pot. The fish must be placed in the upper pot. Around the upper pot make a fire, and the fish will melt, and the oil will flow into the lower vessel. Take this oil, and grease the horse's eyes therewith frequently during the day. In the course of four weeks horses so treated will see again.
The grimoire Egyptian Secrets of Albertus Magnus lists this spell.
Timeline of related events
1725Publication of Egyptian Secrets of Albertus Magnus (lists this spell)
1869English-language translation of Egyptian Secrets (lists this spell)