“…When equation (1) is written in the form (2) Po=F/C+P, it is apparent that the abnormalities in intraocular pressure that characterize the glaucomatous state, as well as alterations induced by therapy, may be discussed GLAUCOMA in terms of changes in (I) C, the facility of aqueous outflow; (II) F, the rate of formation of aqueous humor, and (III) PT, the episcleral venous pressure.…”