GLAUCOMA is a pathologic condition of the eye in which an elevation of intraocular pressure results in damage to or even complete loss of vision. It may be stated at this point that treatment should be guided by the damage to function and not, as is often the case, by the state of the intraocular pressure. It is not intended that one should ignore the tension, but it is urged that the greater emphasis be placed on the findings in the visual fields as a criterion for treatment. Every one is familiar with the fact that certain patients maintain a relatively high pressure with little or no loss of visual fields, while others continue to lose field even though the tension is apparently within normal limits.
The treatment of glaucoma is notoriously unsatisfactory. Neither medical nor surgical treatment can be entirely effective until the cause or causes of primary glaucoma
O'BRIEN CS. SURGICAL TREATMENT OF PRIMARY GLAUCOMA. Arch Ophthalmol. 1947;37(2):134-138. doi:10.1001/archopht.1947.00890220143002