After observing the results obtained by Colonel Elliot in treating glaucoma by his corneoscleral trephining operation, it seemed possible that scleral trephining might be utilized in the treatment of detachment of the retina. May 19, 1913, the first operation was performed, and since that time fifteen operations have been made on eleven patients, all of which are included in this report. Two operations were performed in Case 7, also in Case 8, and three in Case 9. In Cases 1 and 2, the sclera was trephined over the site of the detachment without incising the choroid and retina. In all the other cases, in addition to trephining the sclera, an incision with a cataract knife was made in the choroid or the choroid and retina, and the subretinal fluid, and, in most instances, a few drops of vitreous, were allowed to escape.