[Central and regional hemodynamics of eye in different course of primary open-angle glaucoma with normalized intraocular pressure and their relationship with circulation types, sympathoadrenal activity and hydrocortisone level].

The relationship of systemic and local hemodynamics with neurohumoral factors has been evaluated in 104 patients with primary open-angle glaucoma with normalized intraocular pressure. Changes in the functional activity of the sympathoadrenal activity and hydrocortisone levels were in high correlation with the initial type of systemic hemodynamics: the hormonal activity of the sympathoadrenal system predominated in patients with eukinetic and hyperkinetic circulation with normal levels of hydrocortisone, while in patients with hypokinetic circulation the mediator (norepinephrine) component of the sympathoadrenal system combined with a high plasma level of hydrocortisone predominated. A principal characteristic of unstable primary open-angle glaucoma, discriminating it from the stable condition in all types of circulation, is the presence of deep autonomic disorders in the neurohumoral mechanisms of autoregulation of ocular blood flow, because of excessive accumulation of norepinephrine, epinephrine, and hydrocortisone in the lacrimal fluid at the expense of their decreased utilization by the receptor systems of ocular tissues and blood vessels.