A preliminary note on a new operative procedure for the establishment of a filtering cicatrix in the treatment of glaucoma.

Elliot, working in 1909 at the Government Ophthalmic Hospital in Madras, began to use a trephine to make a very anterior sclerectomy under a conjunctival flap, coupled with a peripheral iridectomy. See also his Sclero-corneal trephining in the operative  treatment of glaucoma, (1913).