The return of hypertension after an apparently faultless operation for glaucoma is a bête noire of the ophthalmic surgeon. It cannot be predicted or forestalled. It must simply be accepted as one of the hazards of glaucoma to be dealt with as well as possible.
The literature is replete with indications and contraindications for primary operations, but there is little general agreement as to the relative efficacy and value of the operations themselves. This is undoubtedly due to a lack of understanding of the etiology and pathology of glaucoma. Each operation is designed to relieve only the hypertension, by removing the obvious barriers to filtration or by providing a vicarious pathway. The underlying disease is not cured by the removal of one of its symptoms.
In spite of innovations and modifications of operations for glaucoma, little factual or practical progress has been made within the past twenty-five years. Statistical reports
KNIGHTON WS. REOPERATIONS FOR GLAUCOMA. Arch Ophthalmol. 1943;30(4):499–504. doi:10.1001/archopht.1943.00880220091009
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