The Journal of Bucharest College of Physicians and the Romanian Academy of Medical Sciences

The Effect of Timolol on the Iris Vascular Tone in Rats


Vascular tone is generally controlled by both the humoral component and the neuro-vegetative component. Regarding the second one, catecholaminergic sympathetic innervation of blood vessels is almost a rule in the body[1,2].
It is known that the iris is sympathetically inner-vated, both at the level of the iris dilator muscle[1,2] and at the level of iris blood vessels[3]. Cathecolamines are responsible for vasoconstriction and, in some vascular beds, vasodilation. […]