[Perfusion pressure in ocular vessels of patients with open-angle glaucoma].
Perfusion pressure in ophthalmic vessels was measured by computer-aided ophthalmodynamography in health, stenoses of the internal carotid artery, and open-angle glaucoma. A total of 70 subjects were examined. Stenoses of the internal carotid artery are associated with a noticeable reduction of perfusion pressure on the side of stenosis. Some patients develop optic nerve atrophy (without excavation). Secondary neovascular glaucoma was diagnosed in 1 patient. Primary open-angle glaucoma was revealed in none of the patients. Increase of intraocular pressure in patients with open-angle glaucoma was associated with a reduction of perfusion pressure. However, in more than 50% of patients a higher pressure was observed in the orbital artery corresponding to the eye with a higher ophthalmic tone than in the contralateral eye. This was conducive to a certain leveling of perfusion pressure. Such a reaction is regarded as a manifestation of autoregulation of ocular vessels, important for blood delivery to the eyes.
Bunin
A Ia
AIa
Mukha
A I
AI
Kolomoĭtseva
E M
EM
D000328:Adult; D000368:Aged; D002343:Carotid Artery, Internal; D016893:Carotid Stenosis / Q000503:physiopathology; D005123:Eye / Q000098:blood supply*; D005260:Female; D005902:Glaucoma, Open-Angle / Q000503:physiopathology*; D006706:Homeostasis; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D009884:Ophthalmodynamometry; D010477:Perfusion
Perfuzionnoe davlenie v sosudakh glaz u bol'nykh otkrytougol'noĭ glaukomoĭ.