The essential purpose of the sclerocorneal trephine operation described by Elliot in 19091 is to provide a subconjunctival fistula through which aqueous humor can escape from the globe into the conjunctiva. Under proper conditions the aqueous humor will be diffused over the eyeball and gradually absorbed into the general circulation under cover of an intact conjunctival epithelium.
Several modifications of Elliot's operation have been devised to overcome certain technical difficulties in the procedure, to make it applicable to the various types of glaucoma or to make it more effective and the result more enduring. Since it was meant to supplant other methods of fistulization, such as those of Lagrange,2 Herbert,3 Fergus4 and others, Elliot advocated its use in all forms of glaucoma.
The classification of glaucoma into congestive or inflammatory, caused by swelling of the ciliary processes, and noncongestive or simple, caused by alteration in the
BENEDICT WL. SCLEROCORNEAL TREPHINING (ELLIOT'S OPERATION). Arch Ophthalmol. 1940;24(6):1100–1112. doi:10.1001/archopht.1940.00870060042002
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