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In angle-closure glaucoma, it has been repeatedly demonstrated that when the angle is entirely open there is no abnormal obstruction to outflow of aqueous and the facility of outflow is normal. During this phase when the angle is open, there is actually no glaucoma though the potentiality of further closure and a return of the glaucoma exists. The sole cause of the rise in pressure in angle-closure glaucoma is closure of the angle and the decrease in facility of outflow and hence the level of tension is in proportion to the extent of closure. Thus in severe acute angle-closure glaucoma almost the entire angle may be closed, and tension is very high. In less severe episodes varying degrees of closure may be found with a proportional elevation of tension.
The purpose of treatment is to open the closed angle, if this is possible, and to prevent further closure. This is
Chandler PA. Just To Be Sure. Arch Ophthalmol. 1962;67(4):395–396. doi:10.1001/archopht.1962.00960020397001
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